diff --git a/CHANGELOG b/CHANGELOG
index 774fe473ebdeba8ef9bbe45cd7183dcabc3c8fc4..9459dfa74330e23d91b78ff8f75af192888583b4 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1 +1,6 @@
-2021-12-02: initial release
+2021-02-25: rewrite for CMK 2.x
+            added warning/critical is chassis grade not equeal maxGrade
+2021-09-10: rewrite parse function
+2021-09-11: added WATO, cleanup
+2022-10-23: fixed warning on upgrade "non-empty params vanished" for discovery_chassis and discovery_sgms
+2023-05-29: moved gui files to ~/local/lib/check_mk/gui/plugins/...