diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 39f0f6ff2..6f8667f29 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -4,7 +4,7 @@
 
 https://openslides.org/
 
-Version 2.3 (unreleased)
+Version 2.3 (2018-09-20)
 ========================
 `Release notes <https://github.com/OpenSlides/OpenSlides/wiki/OpenSlides-2.3>`_ ·
 `Milestone <https://github.com/OpenSlides/OpenSlides/milestones/2.3>`_
diff --git a/openslides/__init__.py b/openslides/__init__.py
index fcb1be7ff..4f0ab8578 100644
--- a/openslides/__init__.py
+++ b/openslides/__init__.py
@@ -1,6 +1,6 @@
 __author__ = 'OpenSlides Team <support@openslides.org>'
 __description__ = 'Presentation and assembly system'
-__version__ = '2.3b2-dev'
+__version__ = '2.3.1-dev'
 __license__ = 'MIT'
 __url__ = 'https://openslides.org'