diff --git a/CHANGELOG b/CHANGELOG
index 475736a3f32bd8bbf52b5389c0446116c4dd7320..89354c622796b928b11f5a408aa3990915038843 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,2 +1,4 @@
+2016-03-31: initial release
 2016-07-02: fixed crit/warn to >=
 2018-09-14: workaround for wrong data from Mobility Express Controller --> removed
+2021-07-15: rewritten for CMK 2.0