diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7e190313f02f94d31bb3a0e9f0310eed7b729ea4..6defee79fbc4c170408f193bdb2e920ff3276826 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added ###
 
+* `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 ###
 
 ### Deprecated ###