diff --git a/docs/Makefile b/docs/Makefile
index 83ad6b7c03a0bdf7647f8f8496d126610465f8fb..825fb626041d3d8ae0d6ac7f1fff05ee4887041c 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2018 Branko Majic
+# Copyright (C) 2018, 2020, 2024 Branko Majic
 #
 # This file is part of Gimmecert documentation.
 #