copyright date updates
diff --git a/examples/in-memory.c b/examples/in-memory.c
index 625e280..e7705dd 100644
--- a/examples/in-memory.c
+++ b/examples/in-memory.c
@@ -1,6 +1,6 @@
 /*
   in-memory.c -- modify zip file in memory
-  Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/examples/windows-open.c b/examples/windows-open.c
index 5108af5..bc8660d 100644
--- a/examples/windows-open.c
+++ b/examples/windows-open.c
@@ -1,6 +1,6 @@
 /*
   windows-open.c -- open zip archive using Windows UTF-16/Unicode file name
-  Copyright (C) 2015-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2015-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/compat.h b/lib/compat.h
index 91e72bb..2f05bf0 100644
--- a/lib/compat.h
+++ b/lib/compat.h
@@ -3,7 +3,7 @@
 
 /*
   compat.h -- compatibility defines.
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip.h b/lib/zip.h
index 69162e3..b0d1493 100644
--- a/lib/zip.h
+++ b/lib/zip.h
@@ -3,7 +3,7 @@
 
 /*
   zip.h -- exported declarations.
-  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2020 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_add.c b/lib/zip_add.c
index f09c9ff..1954235 100644
--- a/lib/zip_add.c
+++ b/lib/zip_add.c
@@ -1,6 +1,6 @@
 /*
   zip_add.c -- add file via callback function
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_add_dir.c b/lib/zip_add_dir.c
index 6beb929..88fcf53 100644
--- a/lib/zip_add_dir.c
+++ b/lib/zip_add_dir.c
@@ -1,6 +1,6 @@
 /*
   zip_add_dir.c -- add directory
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_add_entry.c b/lib/zip_add_entry.c
index 45def7a..f52e0b5 100644
--- a/lib/zip_add_entry.c
+++ b/lib/zip_add_entry.c
@@ -1,6 +1,6 @@
 /*
   zip_add_entry.c -- create and init struct zip_entry
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_algorithm_bzip2.c b/lib/zip_algorithm_bzip2.c
index 72fbad1..df4aeb6 100644
--- a/lib/zip_algorithm_bzip2.c
+++ b/lib/zip_algorithm_bzip2.c
@@ -1,6 +1,6 @@
 /*
   zip_algorithm_bzip2.c -- bzip2 (de)compression routines
-  Copyright (C) 2017-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2017-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_algorithm_deflate.c b/lib/zip_algorithm_deflate.c
index 519ef80..30e072a 100644
--- a/lib/zip_algorithm_deflate.c
+++ b/lib/zip_algorithm_deflate.c
@@ -1,6 +1,6 @@
 /*
   zip_algorithm_deflate.c -- deflate (de)compression routines
-  Copyright (C) 2017-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2017-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_algorithm_xz.c b/lib/zip_algorithm_xz.c
index 16f081a..6dd14ce 100644
--- a/lib/zip_algorithm_xz.c
+++ b/lib/zip_algorithm_xz.c
@@ -1,7 +1,7 @@
 /*
   zip_algorithm_xz.c      -- XZ (de)compression routines
   Bazed on zip_algorithm_deflate.c -- deflate (de)compression routines
-  Copyright (C) 2017-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2017-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_buffer.c b/lib/zip_buffer.c
index 37977f0..8c24b27 100644
--- a/lib/zip_buffer.c
+++ b/lib/zip_buffer.c
@@ -1,6 +1,6 @@
 /*
  zip_buffer.c -- bounds checked access to memory buffer
- Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+ Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
  This file is part of libzip, a library to manipulate ZIP archives.
  The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_close.c b/lib/zip_close.c
index a1a28b0..2a9fed2 100644
--- a/lib/zip_close.c
+++ b/lib/zip_close.c
@@ -1,6 +1,6 @@
 /*
   zip_close.c -- close zip archive and update changes
-  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2020 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_crypto.h b/lib/zip_crypto.h
index 585de21..f46c7d8 100644
--- a/lib/zip_crypto.h
+++ b/lib/zip_crypto.h
@@ -1,6 +1,6 @@
 /*
   zip_crypto.h -- crypto definitions
-  Copyright (C) 2017-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2017-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_crypto_commoncrypto.c b/lib/zip_crypto_commoncrypto.c
index da223a9..2d57bd4 100644
--- a/lib/zip_crypto_commoncrypto.c
+++ b/lib/zip_crypto_commoncrypto.c
@@ -1,6 +1,6 @@
 /*
   zip_crypto_commoncrypto.c -- CommonCrypto wrapper.
-  Copyright (C) 2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2018-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_crypto_gnutls.c b/lib/zip_crypto_gnutls.c
index 88eb6ff..9f9e991 100644
--- a/lib/zip_crypto_gnutls.c
+++ b/lib/zip_crypto_gnutls.c
@@ -1,6 +1,6 @@
 /*
   zip_crypto_gnutls.c -- GnuTLS wrapper.
-  Copyright (C) 2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2018-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_crypto_gnutls.h b/lib/zip_crypto_gnutls.h
index 7e15808..484ddbb 100644
--- a/lib/zip_crypto_gnutls.h
+++ b/lib/zip_crypto_gnutls.h
@@ -1,6 +1,6 @@
 /*
   zip_crypto_gnutls.h -- definitions for GnuTLS wrapper.
-  Copyright (C) 2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2018-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_crypto_mbedtls.c b/lib/zip_crypto_mbedtls.c
index c85943b..f0049ea 100644
--- a/lib/zip_crypto_mbedtls.c
+++ b/lib/zip_crypto_mbedtls.c
@@ -1,6 +1,6 @@
 /*
   zip_crypto_mbedtls.c -- mbed TLS wrapper
-  Copyright (C) 2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2018-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_crypto_mbedtls.h b/lib/zip_crypto_mbedtls.h
index edfef76..7381951 100644
--- a/lib/zip_crypto_mbedtls.h
+++ b/lib/zip_crypto_mbedtls.h
@@ -1,6 +1,6 @@
 /*
   zip_crypto_mbedtls.h -- definitions for mbedtls wrapper
-  Copyright (C) 2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2018-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_crypto_openssl.c b/lib/zip_crypto_openssl.c
index 4760592..1cb0047 100644
--- a/lib/zip_crypto_openssl.c
+++ b/lib/zip_crypto_openssl.c
@@ -1,6 +1,6 @@
 /*
   zip_crypto_openssl.c -- OpenSSL wrapper.
-  Copyright (C) 2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2018-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_crypto_openssl.h b/lib/zip_crypto_openssl.h
index 991884f..51bd4ed 100644
--- a/lib/zip_crypto_openssl.h
+++ b/lib/zip_crypto_openssl.h
@@ -1,6 +1,6 @@
 /*
   zip_crypto_openssl.h -- definitions for OpenSSL wrapper.
-  Copyright (C) 2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2018-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_crypto_win.c b/lib/zip_crypto_win.c
index 35a5384..97727ad 100644
--- a/lib/zip_crypto_win.c
+++ b/lib/zip_crypto_win.c
@@ -1,6 +1,6 @@
 /*
   zip_crypto_win.c -- Windows Crypto API wrapper.
-  Copyright (C) 2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2018-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_crypto_win.h b/lib/zip_crypto_win.h
index 2b13c07..d5c22a9 100644
--- a/lib/zip_crypto_win.h
+++ b/lib/zip_crypto_win.h
@@ -1,6 +1,6 @@
 /*
   zip_crypto_win.h -- Windows Crypto API wrapper.
-  Copyright (C) 2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2018-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_delete.c b/lib/zip_delete.c
index 458a1b8..97701a0 100644
--- a/lib/zip_delete.c
+++ b/lib/zip_delete.c
@@ -1,6 +1,6 @@
 /*
   zip_delete.c -- delete file from zip archive
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_dir_add.c b/lib/zip_dir_add.c
index 46c76cf..c40b1cb 100644
--- a/lib/zip_dir_add.c
+++ b/lib/zip_dir_add.c
@@ -1,6 +1,6 @@
 /*
   zip_dir_add.c -- add directory
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_dirent.c b/lib/zip_dirent.c
index 62246c5..2bbb63d 100644
--- a/lib/zip_dirent.c
+++ b/lib/zip_dirent.c
@@ -1,6 +1,6 @@
 /*
   zip_dirent.c -- read directory entry (local or central), clean dirent
-  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2020 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_discard.c b/lib/zip_discard.c
index 94972cf..12f0636 100644
--- a/lib/zip_discard.c
+++ b/lib/zip_discard.c
@@ -1,6 +1,6 @@
 /*
   zip_discard.c -- discard and free struct zip
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_entry.c b/lib/zip_entry.c
index 55f6458..52ecaef 100644
--- a/lib/zip_entry.c
+++ b/lib/zip_entry.c
@@ -1,6 +1,6 @@
 /*
   zip_entry.c -- struct zip_entry helper functions
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_error.c b/lib/zip_error.c
index e05ae50..a0f74f0 100644
--- a/lib/zip_error.c
+++ b/lib/zip_error.c
@@ -1,6 +1,6 @@
 /*
   zip_error.c -- zip_error_t helper functions
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_error_clear.c b/lib/zip_error_clear.c
index 6b3a8da..eec1568 100644
--- a/lib/zip_error_clear.c
+++ b/lib/zip_error_clear.c
@@ -1,6 +1,6 @@
 /*
   zip_error_clear.c -- clear zip error
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_error_get.c b/lib/zip_error_get.c
index 12341d1..9588b4c 100644
--- a/lib/zip_error_get.c
+++ b/lib/zip_error_get.c
@@ -1,6 +1,6 @@
 /*
   zip_error_get.c -- get zip error
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_error_get_sys_type.c b/lib/zip_error_get_sys_type.c
index 80bfc0c..3dfe5c2 100644
--- a/lib/zip_error_get_sys_type.c
+++ b/lib/zip_error_get_sys_type.c
@@ -1,6 +1,6 @@
 /*
   zip_error_get_sys_type.c -- return type of system error code
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_error_strerror.c b/lib/zip_error_strerror.c
index 0f650b5..6358577 100644
--- a/lib/zip_error_strerror.c
+++ b/lib/zip_error_strerror.c
@@ -1,6 +1,6 @@
 /*
   zip_error_sterror.c -- get string representation of struct zip_error
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_error_to_str.c b/lib/zip_error_to_str.c
index bf51569..13faf96 100644
--- a/lib/zip_error_to_str.c
+++ b/lib/zip_error_to_str.c
@@ -1,6 +1,6 @@
 /*
   zip_error_to_str.c -- get string representation of zip error code
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_extra_field.c b/lib/zip_extra_field.c
index a17e491..7114a25 100644
--- a/lib/zip_extra_field.c
+++ b/lib/zip_extra_field.c
@@ -1,6 +1,6 @@
 /*
   zip_extra_field.c -- manipulate extra fields
-  Copyright (C) 2012-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2012-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_extra_field_api.c b/lib/zip_extra_field_api.c
index 31808de..605f95d 100644
--- a/lib/zip_extra_field_api.c
+++ b/lib/zip_extra_field_api.c
@@ -1,6 +1,6 @@
 /*
   zip_extra_field_api.c -- public extra fields API functions
-  Copyright (C) 2012-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2012-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_fclose.c b/lib/zip_fclose.c
index 1c69a96..6eb9dc9 100644
--- a/lib/zip_fclose.c
+++ b/lib/zip_fclose.c
@@ -1,6 +1,6 @@
 /*
   zip_fclose.c -- close file in zip archive
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_fdopen.c b/lib/zip_fdopen.c
index 3270935..5a732cd 100644
--- a/lib/zip_fdopen.c
+++ b/lib/zip_fdopen.c
@@ -1,6 +1,6 @@
 /*
   zip_fdopen.c -- open read-only archive from file descriptor
-  Copyright (C) 2009-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2009-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_file_add.c b/lib/zip_file_add.c
index c2c13d6..c019d8d 100644
--- a/lib/zip_file_add.c
+++ b/lib/zip_file_add.c
@@ -1,6 +1,6 @@
 /*
   zip_file_add.c -- add file via callback function
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_file_error_clear.c b/lib/zip_file_error_clear.c
index 2e7dcea..47e5da6 100644
--- a/lib/zip_file_error_clear.c
+++ b/lib/zip_file_error_clear.c
@@ -1,6 +1,6 @@
 /*
   zip_file_error_clear.c -- clear zip file error
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_file_error_get.c b/lib/zip_file_error_get.c
index 1d13807..1ed68df 100644
--- a/lib/zip_file_error_get.c
+++ b/lib/zip_file_error_get.c
@@ -1,6 +1,6 @@
 /*
   zip_file_error_get.c -- get zip file error
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_file_get_comment.c b/lib/zip_file_get_comment.c
index ad944aa..8f68141 100644
--- a/lib/zip_file_get_comment.c
+++ b/lib/zip_file_get_comment.c
@@ -1,6 +1,6 @@
 /*
   zip_file_get_comment.c -- get file comment
-  Copyright (C) 2006-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2006-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_file_get_external_attributes.c b/lib/zip_file_get_external_attributes.c
index e2e5535..ebc2058 100644
--- a/lib/zip_file_get_external_attributes.c
+++ b/lib/zip_file_get_external_attributes.c
@@ -1,6 +1,6 @@
 /*
   zip_file_get_external_attributes.c -- get opsys/external attributes
-  Copyright (C) 2013-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2013-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_file_get_offset.c b/lib/zip_file_get_offset.c
index 858a78a..9ea8909 100644
--- a/lib/zip_file_get_offset.c
+++ b/lib/zip_file_get_offset.c
@@ -1,6 +1,6 @@
 /*
   zip_file_get_offset.c -- get offset of file data in archive.
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_file_rename.c b/lib/zip_file_rename.c
index cc42dfc..7ca428c 100644
--- a/lib/zip_file_rename.c
+++ b/lib/zip_file_rename.c
@@ -1,6 +1,6 @@
 /*
   zip_file_rename.c -- rename file in zip archive
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_file_replace.c b/lib/zip_file_replace.c
index 70b379a..87401f4 100644
--- a/lib/zip_file_replace.c
+++ b/lib/zip_file_replace.c
@@ -1,6 +1,6 @@
 /*
   zip_file_replace.c -- replace file via callback function
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_file_set_comment.c b/lib/zip_file_set_comment.c
index ae6b602..c309db8 100644
--- a/lib/zip_file_set_comment.c
+++ b/lib/zip_file_set_comment.c
@@ -1,6 +1,6 @@
 /*
   zip_file_set_comment.c -- set comment for file in archive
-  Copyright (C) 2006-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2006-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_file_set_encryption.c b/lib/zip_file_set_encryption.c
index 7e7a9b1..a66a1b5 100644
--- a/lib/zip_file_set_encryption.c
+++ b/lib/zip_file_set_encryption.c
@@ -1,6 +1,6 @@
 /*
   zip_file_set_encryption.c -- set encryption for file in archive
-  Copyright (C) 2016-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2016-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_file_set_external_attributes.c b/lib/zip_file_set_external_attributes.c
index c412f27..bb2ea61 100644
--- a/lib/zip_file_set_external_attributes.c
+++ b/lib/zip_file_set_external_attributes.c
@@ -1,6 +1,6 @@
 /*
   zip_file_set_external_attributes.c -- set external attributes for entry
-  Copyright (C) 2013-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2013-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_file_set_mtime.c b/lib/zip_file_set_mtime.c
index 5b54c38..838548e 100644
--- a/lib/zip_file_set_mtime.c
+++ b/lib/zip_file_set_mtime.c
@@ -1,6 +1,6 @@
 /*
  zip_file_set_mtime.c -- set modification time of entry.
- Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+ Copyright (C) 2014-2020 Dieter Baron and Thomas Klausner
 
  This file is part of libzip, a library to manipulate ZIP archives.
  The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_file_strerror.c b/lib/zip_file_strerror.c
index 189c556..1fa7fff 100644
--- a/lib/zip_file_strerror.c
+++ b/lib/zip_file_strerror.c
@@ -1,6 +1,6 @@
 /*
   zip_file_sterror.c -- get string representation of zip file error
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_filerange_crc.c b/lib/zip_filerange_crc.c
index 33bf5d8..b887363 100644
--- a/lib/zip_filerange_crc.c
+++ b/lib/zip_filerange_crc.c
@@ -1,6 +1,6 @@
 /*
   zip_filerange_crc.c -- compute CRC32 for a range of a file
-  Copyright (C) 2008-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2008-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_fopen.c b/lib/zip_fopen.c
index 4ef76ba..4f1a051 100644
--- a/lib/zip_fopen.c
+++ b/lib/zip_fopen.c
@@ -1,6 +1,6 @@
 /*
   zip_fopen.c -- open file in zip archive for reading
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_fopen_encrypted.c b/lib/zip_fopen_encrypted.c
index 47cd377..9e9b13e 100644
--- a/lib/zip_fopen_encrypted.c
+++ b/lib/zip_fopen_encrypted.c
@@ -1,6 +1,6 @@
 /*
   zip_fopen_encrypted.c -- open file for reading with password
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_fopen_index.c b/lib/zip_fopen_index.c
index 5f0dc2a..ffca281 100644
--- a/lib/zip_fopen_index.c
+++ b/lib/zip_fopen_index.c
@@ -1,6 +1,6 @@
 /*
   zip_fopen_index.c -- open file in zip archive for reading by index
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_fopen_index_encrypted.c b/lib/zip_fopen_index_encrypted.c
index 4d4aee3..6712c32 100644
--- a/lib/zip_fopen_index_encrypted.c
+++ b/lib/zip_fopen_index_encrypted.c
@@ -1,6 +1,6 @@
 /*
   zip_fopen_index_encrypted.c -- open file for reading by index w/ password
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_fread.c b/lib/zip_fread.c
index 3020a16..646d712 100644
--- a/lib/zip_fread.c
+++ b/lib/zip_fread.c
@@ -1,6 +1,6 @@
 /*
   zip_fread.c -- read from file
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_fseek.c b/lib/zip_fseek.c
index 3557401..86d3865 100644
--- a/lib/zip_fseek.c
+++ b/lib/zip_fseek.c
@@ -1,6 +1,6 @@
 /*
   zip_fseek.c -- seek in file
-  Copyright (C) 2016-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2016-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_ftell.c b/lib/zip_ftell.c
index f4e4550..9502dd6 100644
--- a/lib/zip_ftell.c
+++ b/lib/zip_ftell.c
@@ -1,6 +1,6 @@
 /*
   zip_ftell.c -- tell position in file
-  Copyright (C) 2016-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2016-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_get_archive_comment.c b/lib/zip_get_archive_comment.c
index c51148d..953c6f4 100644
--- a/lib/zip_get_archive_comment.c
+++ b/lib/zip_get_archive_comment.c
@@ -1,6 +1,6 @@
 /*
   zip_get_archive_comment.c -- get archive comment
-  Copyright (C) 2006-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2006-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_get_archive_flag.c b/lib/zip_get_archive_flag.c
index 1aaca72..fa4dd50 100644
--- a/lib/zip_get_archive_flag.c
+++ b/lib/zip_get_archive_flag.c
@@ -1,6 +1,6 @@
 /*
   zip_get_archive_flag.c -- get archive global flag
-  Copyright (C) 2008-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2008-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_get_encryption_implementation.c b/lib/zip_get_encryption_implementation.c
index 07e4316..c9d52ad 100644
--- a/lib/zip_get_encryption_implementation.c
+++ b/lib/zip_get_encryption_implementation.c
@@ -1,6 +1,6 @@
 /*
   zip_get_encryption_implementation.c -- get encryption implementation
-  Copyright (C) 2009-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2009-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_get_file_comment.c b/lib/zip_get_file_comment.c
index 6e85a58..f800686 100644
--- a/lib/zip_get_file_comment.c
+++ b/lib/zip_get_file_comment.c
@@ -1,6 +1,6 @@
 /*
   zip_get_file_comment.c -- get file comment
-  Copyright (C) 2006-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2006-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_get_name.c b/lib/zip_get_name.c
index 2ac005a..4344209 100644
--- a/lib/zip_get_name.c
+++ b/lib/zip_get_name.c
@@ -1,6 +1,6 @@
 /*
   zip_get_name.c -- get filename for a file in zip file
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_get_num_entries.c b/lib/zip_get_num_entries.c
index 99dfc7a..410d26e 100644
--- a/lib/zip_get_num_entries.c
+++ b/lib/zip_get_num_entries.c
@@ -1,6 +1,6 @@
 /*
   zip_get_num_entries.c -- get number of entries in archive
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_get_num_files.c b/lib/zip_get_num_files.c
index b6e910e..4895eaa 100644
--- a/lib/zip_get_num_files.c
+++ b/lib/zip_get_num_files.c
@@ -1,6 +1,6 @@
 /*
   zip_get_num_files.c -- get number of files in archive
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_hash.c b/lib/zip_hash.c
index 7288453..3206dbf 100644
--- a/lib/zip_hash.c
+++ b/lib/zip_hash.c
@@ -1,6 +1,6 @@
 /*
   zip_hash.c -- hash table string -> uint64
-  Copyright (C) 2015-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2015-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_io_util.c b/lib/zip_io_util.c
index 53f4437..dd07cbb 100644
--- a/lib/zip_io_util.c
+++ b/lib/zip_io_util.c
@@ -1,6 +1,6 @@
 /*
  zip_io_util.c -- I/O helper functions
- Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+ Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
  This file is part of libzip, a library to manipulate ZIP archives.
  The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_libzip_version.c b/lib/zip_libzip_version.c
index c6787a9..fadbc69 100644
--- a/lib/zip_libzip_version.c
+++ b/lib/zip_libzip_version.c
@@ -1,6 +1,6 @@
 /*
   zip_libzip_version.c -- return run-time version of library
-  Copyright (C) 2017-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2017-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_memdup.c b/lib/zip_memdup.c
index d604408..05fcb7b 100644
--- a/lib/zip_memdup.c
+++ b/lib/zip_memdup.c
@@ -1,6 +1,6 @@
 /*
   zip_memdup.c -- internal zip function, "strdup" with len
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_name_locate.c b/lib/zip_name_locate.c
index 37b1ffe..f7318ec 100644
--- a/lib/zip_name_locate.c
+++ b/lib/zip_name_locate.c
@@ -1,6 +1,6 @@
 /*
   zip_name_locate.c -- get index by name
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_new.c b/lib/zip_new.c
index 1cd614d..4f58ecc 100644
--- a/lib/zip_new.c
+++ b/lib/zip_new.c
@@ -1,6 +1,6 @@
 /*
   zip_new.c -- create and init struct zip
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_open.c b/lib/zip_open.c
index dec6a98..4e29c5b 100644
--- a/lib/zip_open.c
+++ b/lib/zip_open.c
@@ -1,6 +1,6 @@
 /*
   zip_open.c -- open zip archive by name
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_progress.c b/lib/zip_progress.c
index 86181b5..d48ae56 100644
--- a/lib/zip_progress.c
+++ b/lib/zip_progress.c
@@ -1,6 +1,6 @@
 /*
  zip_progress.c -- progress reporting
- Copyright (C) 2017-2018 Dieter Baron and Thomas Klausner
+ Copyright (C) 2017-2020 Dieter Baron and Thomas Klausner
 
  This file is part of libzip, a library to manipulate ZIP archives.
  The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_random_unix.c b/lib/zip_random_unix.c
index 17cd46e..24c7c1f 100644
--- a/lib/zip_random_unix.c
+++ b/lib/zip_random_unix.c
@@ -1,6 +1,6 @@
 /*
   zip_random_unix.c -- fill the user's buffer with random stuff (Unix version)
-  Copyright (C) 2016-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2016-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_random_uwp.c b/lib/zip_random_uwp.c
index 465d532..ce7d6b8 100644
--- a/lib/zip_random_uwp.c
+++ b/lib/zip_random_uwp.c
@@ -1,6 +1,6 @@
 /*
   zip_random_uwp.c -- fill the user's buffer with random stuff (UWP version)
-  Copyright (C) 2017-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2017-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_random_win32.c b/lib/zip_random_win32.c
index 1f1dc55..16d0f64 100644
--- a/lib/zip_random_win32.c
+++ b/lib/zip_random_win32.c
@@ -1,6 +1,6 @@
 /*
   zip_random_win32.c -- fill the user's buffer with random stuff (Windows version)
-  Copyright (C) 2016-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2016-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_rename.c b/lib/zip_rename.c
index 4fdf636..e5f1682 100644
--- a/lib/zip_rename.c
+++ b/lib/zip_rename.c
@@ -1,6 +1,6 @@
 /*
   zip_rename.c -- rename file in zip archive
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_replace.c b/lib/zip_replace.c
index 2e982af..30a2eb1 100644
--- a/lib/zip_replace.c
+++ b/lib/zip_replace.c
@@ -1,6 +1,6 @@
 /*
   zip_replace.c -- replace file via callback function
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_set_archive_comment.c b/lib/zip_set_archive_comment.c
index 166a2c0..3f050b3 100644
--- a/lib/zip_set_archive_comment.c
+++ b/lib/zip_set_archive_comment.c
@@ -1,6 +1,6 @@
 /*
   zip_set_archive_comment.c -- set archive comment
-  Copyright (C) 2006-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2006-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_set_archive_flag.c b/lib/zip_set_archive_flag.c
index facf614..e0d5502 100644
--- a/lib/zip_set_archive_flag.c
+++ b/lib/zip_set_archive_flag.c
@@ -1,6 +1,6 @@
 /*
   zip_get_archive_flag.c -- set archive global flag
-  Copyright (C) 2008-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2008-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_set_default_password.c b/lib/zip_set_default_password.c
index 8081657..41c7c51 100644
--- a/lib/zip_set_default_password.c
+++ b/lib/zip_set_default_password.c
@@ -1,6 +1,6 @@
 /*
   zip_set_default_password.c -- set default password for decryption
-  Copyright (C) 2009-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2009-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_set_file_comment.c b/lib/zip_set_file_comment.c
index e4e0331..1fa01ae 100644
--- a/lib/zip_set_file_comment.c
+++ b/lib/zip_set_file_comment.c
@@ -1,6 +1,6 @@
 /*
   zip_set_file_comment.c -- set comment for file in archive
-  Copyright (C) 2006-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2006-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_set_file_compression.c b/lib/zip_set_file_compression.c
index 054dd1f..927fbb7 100644
--- a/lib/zip_set_file_compression.c
+++ b/lib/zip_set_file_compression.c
@@ -1,6 +1,6 @@
 /*
   zip_set_file_compression.c -- set compression for file in archive
-  Copyright (C) 2012-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2012-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_set_name.c b/lib/zip_set_name.c
index aa1dd8e..43c772e 100644
--- a/lib/zip_set_name.c
+++ b/lib/zip_set_name.c
@@ -1,6 +1,6 @@
 /*
   zip_set_name.c -- rename helper function
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_begin_write.c b/lib/zip_source_begin_write.c
index a8b90b5..432c2c1 100644
--- a/lib/zip_source_begin_write.c
+++ b/lib/zip_source_begin_write.c
@@ -1,6 +1,6 @@
 /*
   zip_source_begin_write.c -- start a new file for writing
-  Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_begin_write_cloning.c b/lib/zip_source_begin_write_cloning.c
index b38de04..41b4c73 100644
--- a/lib/zip_source_begin_write_cloning.c
+++ b/lib/zip_source_begin_write_cloning.c
@@ -1,6 +1,6 @@
 /*
   zip_source_begin_write_cloning.c -- clone part of file for writing
-  Copyright (C) 2017-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2017-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_buffer.c b/lib/zip_source_buffer.c
index b80afca..0685fb3 100644
--- a/lib/zip_source_buffer.c
+++ b/lib/zip_source_buffer.c
@@ -1,6 +1,6 @@
 /*
   zip_source_buffer.c -- create zip data source from buffer
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_call.c b/lib/zip_source_call.c
index 3f374fc..e7c2954 100644
--- a/lib/zip_source_call.c
+++ b/lib/zip_source_call.c
@@ -1,6 +1,6 @@
 /*
  zip_source_call.c -- invoke callback command on zip_source
- Copyright (C) 2009-2018 Dieter Baron and Thomas Klausner
+ Copyright (C) 2009-2019 Dieter Baron and Thomas Klausner
 
  This file is part of libzip, a library to manipulate ZIP archives.
  The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_close.c b/lib/zip_source_close.c
index 7916550..ab7898c 100644
--- a/lib/zip_source_close.c
+++ b/lib/zip_source_close.c
@@ -1,6 +1,6 @@
 /*
   zip_source_close.c -- close zip_source (stop reading)
-  Copyright (C) 2009-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2009-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_commit_write.c b/lib/zip_source_commit_write.c
index 67881f0..d1254bf 100644
--- a/lib/zip_source_commit_write.c
+++ b/lib/zip_source_commit_write.c
@@ -1,6 +1,6 @@
 /*
   zip_source_commit_write.c -- commit changes to file
-  Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_compress.c b/lib/zip_source_compress.c
index ed9a8db..59b1212 100644
--- a/lib/zip_source_compress.c
+++ b/lib/zip_source_compress.c
@@ -1,6 +1,6 @@
 /*
   zip_source_compress.c -- (de)compression routines
-  Copyright (C) 2017-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2017-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_crc.c b/lib/zip_source_crc.c
index e16f929..56572c0 100644
--- a/lib/zip_source_crc.c
+++ b/lib/zip_source_crc.c
@@ -1,6 +1,6 @@
 /*
   zip_source_crc.c -- pass-through source that calculates CRC32 and size
-  Copyright (C) 2009-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2009-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_error.c b/lib/zip_source_error.c
index 1e0e0d4..2257f71 100644
--- a/lib/zip_source_error.c
+++ b/lib/zip_source_error.c
@@ -1,6 +1,6 @@
 /*
   zip_source_error.c -- get last error from zip_source
-  Copyright (C) 2009-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2009-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_file.c b/lib/zip_source_file.c
index 8714785..3fff4e3 100644
--- a/lib/zip_source_file.c
+++ b/lib/zip_source_file.c
@@ -1,6 +1,6 @@
 /*
   zip_source_file.c -- create data source from file
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_free.c b/lib/zip_source_free.c
index dd3c6df..2f10ef8 100644
--- a/lib/zip_source_free.c
+++ b/lib/zip_source_free.c
@@ -1,6 +1,6 @@
 /*
   zip_source_free.c -- free zip data source
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_function.c b/lib/zip_source_function.c
index c9730c9..d5c1b5b 100644
--- a/lib/zip_source_function.c
+++ b/lib/zip_source_function.c
@@ -1,6 +1,6 @@
 /*
   zip_source_function.c -- create zip data source from callback function
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_get_compression_flags.c b/lib/zip_source_get_compression_flags.c
index a9442aa..7e04bed 100644
--- a/lib/zip_source_get_compression_flags.c
+++ b/lib/zip_source_get_compression_flags.c
@@ -1,6 +1,6 @@
 /*
   zip_source_get_compression_flags.c -- get compression flags for entry
-  Copyright (C) 2017-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2017-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_is_deleted.c b/lib/zip_source_is_deleted.c
index 090a67b..edd10ca 100644
--- a/lib/zip_source_is_deleted.c
+++ b/lib/zip_source_is_deleted.c
@@ -1,6 +1,6 @@
 /*
   zip_source_is_deleted.c -- was archive was removed?
-  Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_layered.c b/lib/zip_source_layered.c
index 580bff0..d02bc85 100644
--- a/lib/zip_source_layered.c
+++ b/lib/zip_source_layered.c
@@ -1,6 +1,6 @@
 /*
   zip_source_layered.c -- create layered source
-  Copyright (C) 2009-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2009-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_open.c b/lib/zip_source_open.c
index d10a3c5..414c677 100644
--- a/lib/zip_source_open.c
+++ b/lib/zip_source_open.c
@@ -1,6 +1,6 @@
 /*
   zip_source_open.c -- open zip_source (prepare for reading)
-  Copyright (C) 2009-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2009-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_pkware.c b/lib/zip_source_pkware.c
index cc510ea..1b59d7a 100644
--- a/lib/zip_source_pkware.c
+++ b/lib/zip_source_pkware.c
@@ -1,6 +1,6 @@
 /*
   zip_source_pkware.c -- Traditional PKWARE de/encryption routines
-  Copyright (C) 2009-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2009-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_read.c b/lib/zip_source_read.c
index 816fb3d..33088cb 100644
--- a/lib/zip_source_read.c
+++ b/lib/zip_source_read.c
@@ -1,6 +1,6 @@
 /*
   zip_source_read.c -- read data from zip_source
-  Copyright (C) 2009-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2009-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_remove.c b/lib/zip_source_remove.c
index 6841b74..14eddb8 100644
--- a/lib/zip_source_remove.c
+++ b/lib/zip_source_remove.c
@@ -1,6 +1,6 @@
 /*
  zip_source_remove.c -- remove empty archive
- Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+ Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
  This file is part of libzip, a library to manipulate ZIP archives.
  The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_rollback_write.c b/lib/zip_source_rollback_write.c
index 04aa938..e8259bf 100644
--- a/lib/zip_source_rollback_write.c
+++ b/lib/zip_source_rollback_write.c
@@ -1,6 +1,6 @@
 /*
   zip_source_rollback_write.c -- discard changes
-  Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_seek.c b/lib/zip_source_seek.c
index c7bd8e6..163daf1 100644
--- a/lib/zip_source_seek.c
+++ b/lib/zip_source_seek.c
@@ -1,6 +1,6 @@
 /*
   zip_source_seek.c -- seek to offset
-  Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_seek_write.c b/lib/zip_source_seek_write.c
index a20dc82..6b0aa78 100644
--- a/lib/zip_source_seek_write.c
+++ b/lib/zip_source_seek_write.c
@@ -1,6 +1,6 @@
 /*
   zip_source_seek_write.c -- seek to offset for writing
-  Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_stat.c b/lib/zip_source_stat.c
index f3af3be..3421d2c 100644
--- a/lib/zip_source_stat.c
+++ b/lib/zip_source_stat.c
@@ -1,6 +1,6 @@
 /*
   zip_source_stat.c -- get meta information from zip_source
-  Copyright (C) 2009-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2009-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_supports.c b/lib/zip_source_supports.c
index 394f06e..8471559 100644
--- a/lib/zip_source_supports.c
+++ b/lib/zip_source_supports.c
@@ -1,6 +1,6 @@
 /*
   zip_source_supports.c -- check for supported functions
-  Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_tell.c b/lib/zip_source_tell.c
index da13cf5..772e252 100644
--- a/lib/zip_source_tell.c
+++ b/lib/zip_source_tell.c
@@ -1,6 +1,6 @@
 /*
   zip_source_tell.c -- report current offset
-  Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_tell_write.c b/lib/zip_source_tell_write.c
index d20139f..96ad7e2 100644
--- a/lib/zip_source_tell_write.c
+++ b/lib/zip_source_tell_write.c
@@ -1,6 +1,6 @@
 /*
   zip_source_tell_write.c -- report current offset for writing
-  Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_win32a.c b/lib/zip_source_win32a.c
index b604e2e..68c007f 100644
--- a/lib/zip_source_win32a.c
+++ b/lib/zip_source_win32a.c
@@ -1,6 +1,6 @@
 /*
   zip_source_win32a.c -- create data source from Windows file (ANSI)
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_win32handle.c b/lib/zip_source_win32handle.c
index baa19cb..8746cdd 100644
--- a/lib/zip_source_win32handle.c
+++ b/lib/zip_source_win32handle.c
@@ -1,6 +1,6 @@
 /*
   zip_source_win32file.c -- create data source from HANDLE (Win32)
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_win32utf8.c b/lib/zip_source_win32utf8.c
index 4ad2bf0..3d2ce39 100644
--- a/lib/zip_source_win32utf8.c
+++ b/lib/zip_source_win32utf8.c
@@ -1,6 +1,6 @@
 /*
   zip_source_win32utf8.c -- create data source from Windows file (UTF-8)
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_win32w.c b/lib/zip_source_win32w.c
index 731a222..75afdcb 100644
--- a/lib/zip_source_win32w.c
+++ b/lib/zip_source_win32w.c
@@ -1,6 +1,6 @@
 /*
   zip_source_win32w.c -- create data source from Windows file (UTF-16)
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_window.c b/lib/zip_source_window.c
index d9e90bf..1276485 100644
--- a/lib/zip_source_window.c
+++ b/lib/zip_source_window.c
@@ -1,6 +1,6 @@
 /*
   zip_source_window.c -- return part of lower source
-  Copyright (C) 2012-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2012-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_winzip_aes_decode.c b/lib/zip_source_winzip_aes_decode.c
index f1a05a8..2ee626a 100644
--- a/lib/zip_source_winzip_aes_decode.c
+++ b/lib/zip_source_winzip_aes_decode.c
@@ -1,6 +1,6 @@
 /*
   zip_source_winzip_aes_decode.c -- Winzip AES decryption routines
-  Copyright (C) 2009-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2009-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_write.c b/lib/zip_source_write.c
index 9f494e0..73fc3a3 100644
--- a/lib/zip_source_write.c
+++ b/lib/zip_source_write.c
@@ -1,6 +1,6 @@
 /*
   zip_source_write.c -- start a new file for writing
-  Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_zip.c b/lib/zip_source_zip.c
index 3fd90ab..1f77aaa 100644
--- a/lib/zip_source_zip.c
+++ b/lib/zip_source_zip.c
@@ -1,6 +1,6 @@
 /*
   zip_source_zip.c -- create data source from zip file
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_source_zip_new.c b/lib/zip_source_zip_new.c
index ab78561..f36609b 100644
--- a/lib/zip_source_zip_new.c
+++ b/lib/zip_source_zip_new.c
@@ -1,6 +1,6 @@
 /*
   zip_source_zip_new.c -- prepare data structures for zip_fopen/zip_source_zip
-  Copyright (C) 2012-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2012-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_stat.c b/lib/zip_stat.c
index 237d985..341c6f7 100644
--- a/lib/zip_stat.c
+++ b/lib/zip_stat.c
@@ -1,6 +1,6 @@
 /*
   zip_stat.c -- get information about file by name
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_stat_index.c b/lib/zip_stat_index.c
index 66b7661..71f8049 100644
--- a/lib/zip_stat_index.c
+++ b/lib/zip_stat_index.c
@@ -1,6 +1,6 @@
 /*
   zip_stat_index.c -- get information about file by index
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2020 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_stat_init.c b/lib/zip_stat_init.c
index 46fa404..6d0903d 100644
--- a/lib/zip_stat_init.c
+++ b/lib/zip_stat_init.c
@@ -1,6 +1,6 @@
 /*
   zip_stat_init.c -- initialize struct zip_stat.
-  Copyright (C) 2006-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2006-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_strerror.c b/lib/zip_strerror.c
index eb94198..906c7f7 100644
--- a/lib/zip_strerror.c
+++ b/lib/zip_strerror.c
@@ -1,6 +1,6 @@
 /*
   zip_sterror.c -- get string representation of zip error
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_string.c b/lib/zip_string.c
index 7e16a72..a6edbc5 100644
--- a/lib/zip_string.c
+++ b/lib/zip_string.c
@@ -1,6 +1,6 @@
 /*
   zip_string.c -- string handling (with encoding)
-  Copyright (C) 2012-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2012-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_unchange.c b/lib/zip_unchange.c
index 8285707..1a78e2c 100644
--- a/lib/zip_unchange.c
+++ b/lib/zip_unchange.c
@@ -1,6 +1,6 @@
 /*
   zip_unchange.c -- undo changes to file in zip archive
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_unchange_all.c b/lib/zip_unchange_all.c
index 6a43358..5e7df80 100644
--- a/lib/zip_unchange_all.c
+++ b/lib/zip_unchange_all.c
@@ -1,6 +1,6 @@
 /*
   zip_unchange.c -- undo changes to all files in zip archive
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_unchange_archive.c b/lib/zip_unchange_archive.c
index 404f1ed..bd223ef 100644
--- a/lib/zip_unchange_archive.c
+++ b/lib/zip_unchange_archive.c
@@ -1,6 +1,6 @@
 /*
   zip_unchange_archive.c -- undo global changes to ZIP archive
-  Copyright (C) 2006-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2006-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_unchange_data.c b/lib/zip_unchange_data.c
index f1df2bd..74a429c 100644
--- a/lib/zip_unchange_data.c
+++ b/lib/zip_unchange_data.c
@@ -1,6 +1,6 @@
 /*
   zip_unchange_data.c -- undo helper function
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_utf-8.c b/lib/zip_utf-8.c
index 684eba5..099db9b 100644
--- a/lib/zip_utf-8.c
+++ b/lib/zip_utf-8.c
@@ -1,6 +1,6 @@
 /*
   zip_utf-8.c -- UTF-8 support functions for libzip
-  Copyright (C) 2011-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2011-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zip_winzip_aes.c b/lib/zip_winzip_aes.c
index 03159d7..188b4bb 100644
--- a/lib/zip_winzip_aes.c
+++ b/lib/zip_winzip_aes.c
@@ -1,6 +1,6 @@
 /*
   zip_winzip_aes.c -- Winzip AES de/encryption backend routines
-  Copyright (C) 2017-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2017-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zipint.h b/lib/zipint.h
index 0e6f610..721d36e 100644
--- a/lib/zipint.h
+++ b/lib/zipint.h
@@ -3,7 +3,7 @@
 
 /*
   zipint.h -- internal declarations.
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2020 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/lib/zipwin32.h b/lib/zipwin32.h
index 7d3ac76..870f1d5 100644
--- a/lib/zipwin32.h
+++ b/lib/zipwin32.h
@@ -3,7 +3,7 @@
 
 /*
   zipwin32.h -- internal declarations for Windows.
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/man/libzip.mdoc b/man/libzip.mdoc
index ec6586b..72f18db 100644
--- a/man/libzip.mdoc
+++ b/man/libzip.mdoc
@@ -1,5 +1,5 @@
 .\" libzip.mdoc -- general overview of available functions
-.\" Copyright (C) 2005-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2005-2020 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_dir_add.mdoc b/man/zip_dir_add.mdoc
index c075f83..4d60f8f 100644
--- a/man/zip_dir_add.mdoc
+++ b/man/zip_dir_add.mdoc
@@ -1,5 +1,5 @@
 .\" zip_dir_add.mdoc -- add directory to zip archive
-.\" Copyright (C) 2006-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2006-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_error_clear.mdoc b/man/zip_error_clear.mdoc
index edac2c3..ebb157a 100644
--- a/man/zip_error_clear.mdoc
+++ b/man/zip_error_clear.mdoc
@@ -1,5 +1,5 @@
 .\" zip_error_clear.mdoc -- clear error state for archive or file
-.\" Copyright (C) 2006-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2006-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_errors.mdoc b/man/zip_errors.mdoc
index 9f6357f..a35890c 100644
--- a/man/zip_errors.mdoc
+++ b/man/zip_errors.mdoc
@@ -1,5 +1,5 @@
 .\" zip_errors.mdoc -- list of all libzip error codes
-.\" Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_fdopen.mdoc b/man/zip_fdopen.mdoc
index 44b5055..8921125 100644
--- a/man/zip_fdopen.mdoc
+++ b/man/zip_fdopen.mdoc
@@ -1,5 +1,5 @@
 .\" zip_fdopen.mdoc -- open zip archive using existing file descriptor
-.\" Copyright (C) 2009-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2009-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_file_add.mdoc b/man/zip_file_add.mdoc
index 9939ddd..4a3e3b0 100644
--- a/man/zip_file_add.mdoc
+++ b/man/zip_file_add.mdoc
@@ -1,5 +1,5 @@
 .\" zip_file_add.mdoc -- add files to zip archive
-.\" Copyright (C) 2004-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2004-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_file_rename.mdoc b/man/zip_file_rename.mdoc
index 017e26e..d1a23d1 100644
--- a/man/zip_file_rename.mdoc
+++ b/man/zip_file_rename.mdoc
@@ -1,5 +1,5 @@
 .\" zip_file_rename.mdoc -- rename file in zip archive
-.\" Copyright (C) 2003-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2003-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_file_set_mtime.mdoc b/man/zip_file_set_mtime.mdoc
index bafa215..b7e91ae 100644
--- a/man/zip_file_set_mtime.mdoc
+++ b/man/zip_file_set_mtime.mdoc
@@ -1,5 +1,5 @@
 .\" zip_file_set_mtime.mdoc -- set mtime for file in zip
-.\" Copyright (C) 2014-2017 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2014-2020 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP files.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_file_strerror.mdoc b/man/zip_file_strerror.mdoc
index 1f16b9b..7ce929d 100644
--- a/man/zip_file_strerror.mdoc
+++ b/man/zip_file_strerror.mdoc
@@ -1,5 +1,5 @@
 .\" zip_file_strerror.mdoc -- get string representation for a zip error
-.\" Copyright (C) 2003-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2003-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_open.mdoc b/man/zip_open.mdoc
index 49d036c..586af78 100644
--- a/man/zip_open.mdoc
+++ b/man/zip_open.mdoc
@@ -1,5 +1,5 @@
 .\" zip_open.mdoc -- open zip archive
-.\" Copyright (C) 2003-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2003-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_set_archive_comment.mdoc b/man/zip_set_archive_comment.mdoc
index 3d90b0b..f4bfad0 100644
--- a/man/zip_set_archive_comment.mdoc
+++ b/man/zip_set_archive_comment.mdoc
@@ -1,5 +1,5 @@
 .\" zip_set_archive_comment.mdoc -- set zip archive comment
-.\" Copyright (C) 2006-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2006-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_source.mdoc b/man/zip_source.mdoc
index 0795bd8..9f3398c 100644
--- a/man/zip_source.mdoc
+++ b/man/zip_source.mdoc
@@ -1,5 +1,5 @@
 .\" zip_source.mdoc -- description of zip data source
-.\" Copyright (C) 2014-2017 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_source_buffer.mdoc b/man/zip_source_buffer.mdoc
index a08927e..b8f0b19 100644
--- a/man/zip_source_buffer.mdoc
+++ b/man/zip_source_buffer.mdoc
@@ -1,5 +1,5 @@
 .\" zip_source_buffer.mdoc -- create zip data source from buffer
-.\" Copyright (C) 2004-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2004-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_source_buffer_fragment.mdoc b/man/zip_source_buffer_fragment.mdoc
index e39eba0..6ac35e0 100644
--- a/man/zip_source_buffer_fragment.mdoc
+++ b/man/zip_source_buffer_fragment.mdoc
@@ -1,5 +1,5 @@
 .\" zip_source_buffer_fragment.mdoc -- create zip data source from multiple buffers
-.\" Copyright (C) 2004-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2004-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_source_file.mdoc b/man/zip_source_file.mdoc
index 90304dd..9f2ed4b 100644
--- a/man/zip_source_file.mdoc
+++ b/man/zip_source_file.mdoc
@@ -1,5 +1,5 @@
 .\" zip_source_file.mdoc -- create data source from a file
-.\" Copyright (C) 2004-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2004-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_source_filep.mdoc b/man/zip_source_filep.mdoc
index 848ba76..fc3f085 100644
--- a/man/zip_source_filep.mdoc
+++ b/man/zip_source_filep.mdoc
@@ -1,5 +1,5 @@
 .\" zip_source_filep.mdoc -- create data source from a file stream
-.\" Copyright (C) 2004-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2004-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_source_stat.mdoc b/man/zip_source_stat.mdoc
index 37b43a9..c501daa 100644
--- a/man/zip_source_stat.mdoc
+++ b/man/zip_source_stat.mdoc
@@ -1,5 +1,5 @@
 .\" zip_source_stat.mdoc -- get information about zip source
-.\" Copyright (C) 2014-2017 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_source_win32a.mdoc b/man/zip_source_win32a.mdoc
index 9b6d762..5761caf 100644
--- a/man/zip_source_win32a.mdoc
+++ b/man/zip_source_win32a.mdoc
@@ -1,5 +1,5 @@
 .\" zip_source_win32a.mdoc -- create data source using a win32 ANSI name
-.\" Copyright (C) 2015-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2015-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_source_win32handle.mdoc b/man/zip_source_win32handle.mdoc
index 920fcb5..a1bf934 100644
--- a/man/zip_source_win32handle.mdoc
+++ b/man/zip_source_win32handle.mdoc
@@ -1,5 +1,5 @@
 .\" zip_source_handle.mdoc -- create data source from a Windows file handle
-.\" Copyright (C) 2015-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2015-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_source_win32w.mdoc b/man/zip_source_win32w.mdoc
index 75d30f4..aa1265d 100644
--- a/man/zip_source_win32w.mdoc
+++ b/man/zip_source_win32w.mdoc
@@ -1,5 +1,5 @@
 .\" zip_source_win32w.mdoc -- create data source using a win32 Unicode name
-.\" Copyright (C) 2015-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2015-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zip_source_zip.mdoc b/man/zip_source_zip.mdoc
index 4da7da4..943ceef 100644
--- a/man/zip_source_zip.mdoc
+++ b/man/zip_source_zip.mdoc
@@ -1,5 +1,5 @@
 .\" zip_source_zip.mdoc -- create data source from zip file
-.\" Copyright (C) 2004-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2004-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zipcmp.mdoc b/man/zipcmp.mdoc
index a3bc508..5311abf 100644
--- a/man/zipcmp.mdoc
+++ b/man/zipcmp.mdoc
@@ -1,5 +1,5 @@
 .\" zipcmp.mdoc -- compare zip archives
-.\" Copyright (C) 2003-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2003-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/man/zipmerge.mdoc b/man/zipmerge.mdoc
index 9c99514..bf0b869 100644
--- a/man/zipmerge.mdoc
+++ b/man/zipmerge.mdoc
@@ -1,5 +1,5 @@
 .\" zipmerge.mdoc -- merge zip archives
-.\" Copyright (C) 2004-2018 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2004-2019 Dieter Baron and Thomas Klausner
 .\"
 .\" This file is part of libzip, a library to manipulate ZIP archives.
 .\" The authors can be contacted at <libzip@nih.at>
diff --git a/regress/add_from_filep.c b/regress/add_from_filep.c
index d477580..cb6fe92 100644
--- a/regress/add_from_filep.c
+++ b/regress/add_from_filep.c
@@ -1,6 +1,6 @@
 /*
   add_from_filep.c -- test case for adding file to archive
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/regress/can_clone_file.c b/regress/can_clone_file.c
index 401e576..1f03b47 100644
--- a/regress/can_clone_file.c
+++ b/regress/can_clone_file.c
@@ -1,6 +1,6 @@
 /*
  can_clone_file.c -- does the current filesystem support cloning
- Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+ Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
  This file is part of libzip, a library to manipulate ZIP archives.
  The authors can be contacted at <libzip@nih.at>
diff --git a/regress/fopen_unchanged.c b/regress/fopen_unchanged.c
index 497d810..9c937b3 100644
--- a/regress/fopen_unchanged.c
+++ b/regress/fopen_unchanged.c
@@ -1,6 +1,6 @@
 /*
   fopen_unchanged.c -- test case for adding file and reading from unchanged
-  Copyright (C) 2012-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2012-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/regress/fread.c b/regress/fread.c
index 0063e3c..e28b8c3 100644
--- a/regress/fread.c
+++ b/regress/fread.c
@@ -1,6 +1,6 @@
 /*
   fread.c -- test cases for reading from zip archives
-  Copyright (C) 2004-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2004-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/regress/hole.c b/regress/hole.c
index 5f24966..542fc3a 100644
--- a/regress/hole.c
+++ b/regress/hole.c
@@ -1,6 +1,6 @@
 /*
  hole.c -- convert huge files with mostly NULs to/from source_hole
- Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+ Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
  This file is part of libzip, a library to manipulate ZIP archives.
  The authors can be contacted at <libzip@nih.at>
diff --git a/regress/malloc.c b/regress/malloc.c
index ba5a105..0032c71 100644
--- a/regress/malloc.c
+++ b/regress/malloc.c
@@ -1,6 +1,6 @@
 /*
   malloc.c -- override *alloc() to allow testing special cases
-  Copyright (C) 2015-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2015-2019 Dieter Baron and Thomas Klausner
 
   This file is part of ckmame, a program to check rom sets for MAME.
   The authors can be contacted at <ckmame@nih.at>
diff --git a/regress/nonrandomopen.c b/regress/nonrandomopen.c
index ec8c5f8..5e3c629 100644
--- a/regress/nonrandomopen.c
+++ b/regress/nonrandomopen.c
@@ -1,7 +1,7 @@
 /*
   nonrandomopen.c -- override zip_secure_random
 
-  Copyright (C) 2017-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2017-2019 Dieter Baron and Thomas Klausner
 
   This file is part of ckmame, a program to check rom sets for MAME.
   The authors can be contacted at <ckmame@nih.at>
diff --git a/regress/nonrandomopentest.c b/regress/nonrandomopentest.c
index 0b5bf9f..be585ee 100644
--- a/regress/nonrandomopentest.c
+++ b/regress/nonrandomopentest.c
@@ -1,6 +1,6 @@
 /*
   nonrandomopentest.c -- test nonrandomopen.so
-  Copyright (C) 2017-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2017-2019 Dieter Baron and Thomas Klausner
 
   This file is part of ckmame, a program to check rom sets for MAME.
   The authors can be contacted at <ckmame@nih.at>
diff --git a/regress/source_hole.c b/regress/source_hole.c
index dc3eec3..5791670 100644
--- a/regress/source_hole.c
+++ b/regress/source_hole.c
@@ -1,6 +1,6 @@
 /*
  source_hole.c -- source for handling huge files that are mostly NULs
- Copyright (C) 2014-2018 Dieter Baron and Thomas Klausner
+ Copyright (C) 2014-2019 Dieter Baron and Thomas Klausner
 
  This file is part of libzip, a library to manipulate ZIP archives.
  The authors can be contacted at <libzip@nih.at>
diff --git a/regress/tryopen.c b/regress/tryopen.c
index a5de773..ee379b8 100644
--- a/regress/tryopen.c
+++ b/regress/tryopen.c
@@ -1,6 +1,6 @@
 /*
   tryopen.c -- tool for tests that try opening zip archives
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/src/getopt.h b/src/getopt.h
index 01dcd93..05669aa 100644
--- a/src/getopt.h
+++ b/src/getopt.h
@@ -3,7 +3,7 @@
 
 /*
   getopt.h -- header for getopt() replacement function
-  Copyright (C) 1999-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
diff --git a/src/zipcmp.c b/src/zipcmp.c
index c20789d..f08ea0b 100644
--- a/src/zipcmp.c
+++ b/src/zipcmp.c
@@ -106,7 +106,7 @@
 Report bugs to <libzip@nih.at>.\n";
 
 char version_string[] = PROGRAM " (" PACKAGE " " VERSION ")\n\
-Copyright (C) 2003-2018 Dieter Baron and Thomas Klausner\n\
+Copyright (C) 2003-2019 Dieter Baron and Thomas Klausner\n\
 " PACKAGE " comes with ABSOLUTELY NO WARRANTY, to the extent permitted by law.\n";
 
 #define OPTIONS "hVipqtv"
diff --git a/src/zipmerge.c b/src/zipmerge.c
index 3b26c95..685bfdf 100644
--- a/src/zipmerge.c
+++ b/src/zipmerge.c
@@ -1,6 +1,6 @@
 /*
   zipmerge.c -- merge zip archives
-  Copyright (C) 2004-2018 Dieter Baron and Thomas Klausner
+  Copyright (C) 2004-2019 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>
@@ -71,7 +71,7 @@
 Report bugs to <libzip@nih.at>.\n";
 
 char version_string[] = PROGRAM " (" PACKAGE " " VERSION ")\n\
-Copyright (C) 2004-2018 Dieter Baron and Thomas Klausner\n\
+Copyright (C) 2004-2019 Dieter Baron and Thomas Klausner\n\
 " PACKAGE " comes with ABSOLUTELY NO WARRANTY, to the extent permitted by law.\n";
 
 #define OPTIONS "hVDiIsS"
diff --git a/src/ziptool.c b/src/ziptool.c
index bcc271e..be30ab1 100644
--- a/src/ziptool.c
+++ b/src/ziptool.c
@@ -1,6 +1,6 @@
 /*
   ziptool.c -- tool for modifying zip archive in multiple ways
-  Copyright (C) 2012-2019 Dieter Baron and Thomas Klausner
+  Copyright (C) 2012-2020 Dieter Baron and Thomas Klausner
 
   This file is part of libzip, a library to manipulate ZIP archives.
   The authors can be contacted at <libzip@nih.at>