diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1fa1fba006..47de7d5eeb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## v2.3.1 - 2023-05-22
+
+### Fixes
+- `DaemonClient`: Clean stale PID file in `stop_daemon` [[#6007]](https://github.com/aiidateam/aiida-core/pull/6007)
+
+
 ## v2.3.0 - 2023-04-17
 
 This release comes with a number of improvements, some of the more useful and important of which are quickly highlighted.
diff --git a/aiida/__init__.py b/aiida/__init__.py
index 31a864697a..9540e46941 100644
--- a/aiida/__init__.py
+++ b/aiida/__init__.py
@@ -28,7 +28,7 @@
     'For further information please visit http://www.aiida.net/. All rights reserved.'
 )
 __license__ = 'MIT license, see LICENSE.txt file.'
-__version__ = '2.3.0'
+__version__ = '2.3.1'
 __authors__ = 'The AiiDA team.'
 __paper__ = (
     'S. P. Huber et al., "AiiDA 1.0, a scalable computational infrastructure for automated reproducible workflows and '