diff --git a/CHANGELOG.md b/CHANGELOG.md
index e5a7f8f6690bd134422255d43d0b7e3bfba7c347..deaf4d135f57dcb5eedb9425fa5156d13839bbfa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed ###
 
+- [#40](https://gitlab.com/caosdb/caosdb-advanced-user-tools/-/issues/40)
+  `assure_object_is_in_list` now handles adding objects to an intially empty
+  list correclty.
+
 ### Security ###
 
 ## [0.4.0] - 2022-04-05  ##