diff --git a/CHANGELOG.md b/CHANGELOG.md
index 874c5b7..66bc2a4 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
 
+### Changes
+
+### Deprecated
+
+### Removed
+
+### Fixed
+
+### Security
+
+## [0.12.0] - 2024.04.02
+
+### Added
+
 - pull request template
 - sphinx documentation
 - publish cve results
@@ -28,8 +42,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - add module name to dynamic models for better debugging
 - allow 'MergedThing' as well as 'Thing' as entityType query parameter
 
-### Deprecated
-
 ### Removed
 
 - remove dynamic extracted model classes and use those from mex-common
@@ -37,5 +49,3 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - don't allow identifierInPrimarySource changes on node updates
-
-### Security
diff --git a/pyproject.toml b/pyproject.toml
index 65ef49a..c008cea 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "mex-backend"
-version = "0.11.0"
+version = "0.12.0"
 description = "Backend server for the RKI metadata exchange."
 authors = ["RKI MEx Team <mex@rki.de>"]
 readme = "README.md"