diff --git a/CHANGELOG b/CHANGELOG
index 50cc3847b746b109ac3c54d3178554403ed43bbe..587fc76a668b0f8683ac014459c3e0a04fd11ffa 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1 +1,5 @@
-2021-08-21: initial release
+2021-08-20: rewritten for CMK 2.0 by thl-cmk[at]outlook[dot]com
+            based on the "BGP Peer State Check" check by Thomas Wollner (tw[at]ollner-net[dot]de), 
+            (http://wollner-net.de/check_mk/network_checks/bgp_peer-1.4.mkp)
+2021-08-21: added more perfdata, added metrics file
+2021-08-22: added WATO options, streamlined with cisco_bgp_peer