diff --git a/doc/COPYING.LESSER b/doc/COPYING.LESSER
index cca7fc27..491226c8 100644
--- a/doc/COPYING.LESSER
+++ b/doc/COPYING.LESSER
@@ -1,7 +1,7 @@
 		   GNU LESSER GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.