diff --git a/CHANGELOG.md b/CHANGELOG.md
index 77be526..05508e5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,11 @@ The format is roughly based on [Keep a Changelog](https://keepachangelog.com/en/
 
 ## unreleased
 
+## 0.40.0
+
 - Update to harmonized `job_option`/`additional` handling in `Connection.create_job` ([#165](https://github.com/Open-EO/openeo-aggregator/issues/165), [Open-EO/openeo-python-client#683](https://github.com/Open-EO/openeo-python-client/issues/683))
+- Update to new "version" property on `GET /processes` ([#165](https://github.com/Open-EO/openeo-aggregator/issues/165), [Open-EO/openeo-python-driver#352](https://github.com/Open-EO/openeo-python-driver/issues/352))
+
 
 ## 0.39.0
 
diff --git a/src/openeo_aggregator/about.py b/src/openeo_aggregator/about.py
index 405cfd8..c5fcae4 100644
--- a/src/openeo_aggregator/about.py
+++ b/src/openeo_aggregator/about.py
@@ -2,7 +2,7 @@
 import sys
 from typing import Optional
 
-__version__ = "0.39.2a1"
+__version__ = "0.40.0a1"
 
 
 def log_version_info(logger: Optional[logging.Logger] = None):