diff --git a/examples/in-memory.c b/examples/in-memory.c
index 19f60ee..7e40c12 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) 2014-2020 Dieter Baron and Thomas Klausner
+  Copyright (C) 2014-2021 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 d01ea06..945f5c4 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) 2015-2020 Dieter Baron and Thomas Klausner
+  Copyright (C) 2015-2021 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_stdio_named.c b/lib/zip_source_file_stdio_named.c
index 974bf52..bedcafb 100644
--- a/lib/zip_source_file_stdio_named.c
+++ b/lib/zip_source_file_stdio_named.c
@@ -1,6 +1,6 @@
 /*
   zip_source_file_stdio_named.c -- source for stdio file opened by name
-  Copyright (C) 1999-2020 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2021 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_win32.c b/lib/zip_source_file_win32.c
index 34645b7..95eef0e 100644
--- a/lib/zip_source_file_win32.c
+++ b/lib/zip_source_file_win32.c
@@ -1,6 +1,6 @@
 /*
   zip_source_file_win32.c -- read-only Windows file source implementation
-  Copyright (C) 1999-2020 Dieter Baron and Thomas Klausner
+  Copyright (C) 1999-2021 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_fread.mdoc b/man/zip_fread.mdoc
index 48166b7..3b1a405 100644
--- a/man/zip_fread.mdoc
+++ b/man/zip_fread.mdoc
@@ -1,5 +1,5 @@
 .\" zip_fread.mdoc -- read from file
-.\" Copyright (C) 2003-2017 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2003-2021 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_fseek.mdoc b/man/zip_fseek.mdoc
index d7dfdae..cfd2041 100644
--- a/man/zip_fseek.mdoc
+++ b/man/zip_fseek.mdoc
@@ -1,5 +1,5 @@
 .\" zip_fseek.mdoc -- seek in file
-.\" Copyright (C) 2016-2017 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2016-2021 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_read.mdoc b/man/zip_source_read.mdoc
index c0fa37d..0c05800 100644
--- a/man/zip_source_read.mdoc
+++ b/man/zip_source_read.mdoc
@@ -1,5 +1,5 @@
 .\" zip_source_read.mdoc -- read data from zip source
-.\" Copyright (C) 2014-2017 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2014-2021 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_rollback_write.mdoc b/man/zip_source_rollback_write.mdoc
index 9d6ab8d..1f3dc53 100644
--- a/man/zip_source_rollback_write.mdoc
+++ b/man/zip_source_rollback_write.mdoc
@@ -1,5 +1,5 @@
 .\" zip_source_rollback_write.mdoc -- undo changes to zip source
-.\" Copyright (C) 2014-2017 Dieter Baron and Thomas Klausner
+.\" Copyright (C) 2014-2021 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>