diff --git a/CHANGELOG.md b/CHANGELOG.md
index 47cd62f..21788ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 
 The format is roughly based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
-## Ongoing
+## [0.20.0]
 
 - move `connections_cache_ttl` config to AggregatorBackendConfig ([#112](https://github.com/Open-EO/openeo-aggregator/issues/112))
 - replace `kazoo_client_factory` config with `zk_memoizer_tracking` ([#112](https://github.com/Open-EO/openeo-aggregator/issues/112))
diff --git a/src/openeo_aggregator/about.py b/src/openeo_aggregator/about.py
index 33ffdca..6a244a6 100644
--- a/src/openeo_aggregator/about.py
+++ b/src/openeo_aggregator/about.py
@@ -2,7 +2,7 @@
 import sys
 from typing import Optional
 
-__version__ = "0.19.0a1"
+__version__ = "0.20.0a1"
 
 
 def log_version_info(logger: Optional[logging.Logger] = None):