diff --git a/CHANGELOG.md b/CHANGELOG.md
index ac0c853b..d6c23640 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,7 @@ change warranting a new major release:
 - First COM subsystem implementation. It mirrors the Syrlinks mode/submodes but also takes
   care of commanding the CCSDS handler. It expects the Syrlinks submodes as mode commands.
   PR: https://egit.irs.uni-stuttgart.de/eive/eive-obsw/pulls/358
+- The CCSDS Handler now has a new submode (3) to configure the default datarate.
 
 # [v1.21.0] 2023-01-26