diff --git a/LICENSE b/LICENSE
index e9fef2a..573d5d9 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
+Copyright (C) 1999-2020 Dieter Baron and Thomas Klausner
 
 The authors can be contacted at <libzip@nih.at>
 
diff --git a/cmake/Dist.cmake b/cmake/Dist.cmake
index 5ec0172..829112f 100644
--- a/cmake/Dist.cmake
+++ b/cmake/Dist.cmake
@@ -1,5 +1,34 @@
-# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-# file LICENSE.
+# Copyright (C) 2020 Dieter Baron and Thomas Klausner
+#
+# The authors can be contacted at <libzip@nih.at>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright
+#   notice, this list of conditions and the following disclaimer in
+#   the documentation and/or other materials provided with the
+#   distribution.
+#
+# 3. The names of the authors may not be used to endorse or promote
+#   products derived from this software without specific prior
+#   written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
+# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+# GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #[=======================================================================[.rst:
 Dist
diff --git a/cmake/FindNettle.cmake b/cmake/FindNettle.cmake
index 2d566f7..5c2a5e6 100644
--- a/cmake/FindNettle.cmake
+++ b/cmake/FindNettle.cmake
@@ -1,5 +1,34 @@
-# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-# file LICENSE.
+# Copyright (C) 2020 Dieter Baron and Thomas Klausner
+#
+# The authors can be contacted at <libzip@nih.at>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright
+#   notice, this list of conditions and the following disclaimer in
+#   the documentation and/or other materials provided with the
+#   distribution.
+#
+# 3. The names of the authors may not be used to endorse or promote
+#   products derived from this software without specific prior
+#   written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
+# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+# GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #[=======================================================================[.rst:
 FindNettle