diff --git a/documentation/_config.yml b/documentation/_config.yml
index d51a3b8..36778ae 100644
--- a/documentation/_config.yml
+++ b/documentation/_config.yml
@@ -1,5 +1,6 @@
 title: Python Workflow Definition
 author: Jan Janssen
+copyright: "2026"
 
 execute:
   execute_notebooks           : off