diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5a6b59a7c..de8f31a03 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Fixed the missing validation of the tags when creating or updating an activity
 - Fixed an issue where the tags of an activity were lost if updating the activity failed
 
 ## 3.27.0 - 2026-07-15