diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9b1ab4456782b859960e7730e329a7641dede4bd..c4cbb2125a03d4c29547703d6a8627fecea37959 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * Entity State support (experimental, no StateModel support yet). See the `caosdb.State` class for
   more information.
+* `etag` property for the `caosdb.Query` class. The etag allows to debug the
+  caching and to decide whether the server has changed between queries.
 
 ### Changed ###