diff --git a/CHANGELOG b/CHANGELOG
index c78ac4aa94cc4528ae23449c9cb5e924e7cb7a3b..ad3f81fba4fe79cb39344063a4cc5c8ca1ce9c9d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -13,3 +13,10 @@
 2020-09-10: fixed typo in metrics file. FMS --> FSM (thanks martin[dot]pechstein[at]posteo[dot]de)
 2020-06-04: code cleanup --> changed isdigit test to try/except loop, changed peer.get test to try/except loop
 2021-03-27: rewrite for CMK2.0
+2021-03-28: added warning for missing prefix limit/warn threshold
+2021-07-08: fixed handling of missing prefix limit/accepted prefixes/warn threshold. thanks to Florian[dot]Dille[at]aldi-sued[dot]com
+2021-07-13: fixed handling of perfdata (in/out updates, in/out total messages). thanks to Florian[dot]Dille[at]aldi-sued[dot]com and timhor[at]outlook[dot]com
+            added type hinting for parsed data (section)
+            optimised data handling in check function (add prefixes to peer info)
+            made default state if item not found configurable via WALO
+2021-07-21: fixed missing oid_end in parse function, thanks to oliverj@cmkforum