diff --git a/doc/manual/licenses.md b/doc/manual/licenses.md
index 3951f08b58..5f1e3ccb82 100644
--- a/doc/manual/licenses.md
+++ b/doc/manual/licenses.md
@@ -7,7 +7,7 @@ Javier Velázquez-Muriel, Friedrich Förster, Elina Tjioe, Hao Fan,
 Seung Joong Kim, Yannick Spill, Riccardo Pellarin.
 
 %IMP is free and open source software. Most of its modules are licensed under
-the terms of the [GNU Lesser General Public License (LGPL)](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html);
-however the remainder are licensed under the [GNU General Public License (GPL)](http://www.gnu.org/copyleft/gpl.html)
+the terms of the [GNU Lesser General Public License (LGPL)](https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html);
+however the remainder are licensed under the [GNU General Public License (GPL)](https://www.gnu.org/licenses/gpl.html)
 due to dependencies on GPL software.
 See the doc page for [each module](../ref/namespaces.html) for details.