diff --git a/CHANGELOG b/CHANGELOG
index 1c7e0b4ba7083b33cfc0cf7df0d80603f7f2a8bd..7caf47e7fed7f8310c61c4fa200ccc575ea8d5b7 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -18,3 +18,4 @@
 2023-06-18: cleanup variable names to better meet python standards
             moved wato file to check_parameters sub directory
 2023-06-19: some refactoring (VsXMetrics class) 
+            If you are updating from a version before 0.5.0-20230619 you need to reconfigure your WAT rules