diff --git a/README.md b/README.md
index 7228f6a..4b9d1f4 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Documentation of data formats and software packages 
 
-Copyright (c) 2023 IIASA; released under the
+Copyright (c) 2023-2024 IIASA; released under the
 <a href="http://creativecommons.org/publicdomain/zero/1.0?ref=chooser-v1" target="_blank" rel="license noopener noreferrer" style="display:inline-block;">
   Creative Commons CC0 1.0 License
   <img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/cc.svg?ref=chooser-v1"><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/zero.svg?ref=chooser-v1">