diff --git a/CHANGELOG.md b/CHANGELOG.md
index a407cd214ba120392df9330811984abb09df7b2d..622d5678c38257fecba88e899aa571a731a5b3a9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added ###
 
+### Changed ###
+
+### Deprecated ###
+
+### Removed ###
+
+### Fixed ###
+
+### Security ###
+
+## [0.5.2] - 2021-06-03 ##
+
+### Added ###
+
 * 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
diff --git a/setup.py b/setup.py
index d491a1d340796b9b4701b307003c3e62e75d6001..d51e7829298b2114711d54fac298b15336a423dc 100755
--- a/setup.py
+++ b/setup.py
@@ -49,7 +49,7 @@ MAJOR = 0
 MINOR = 5
 MICRO = 2
 PRE = ""  # e.g. rc0, alpha.1, 0.beta-23
-ISRELEASED = False
+ISRELEASED = True
 
 if PRE:
     VERSION = "{}.{}.{}-{}".format(MAJOR, MINOR, MICRO, PRE)