diff --git a/CHANGELOG.md b/CHANGELOG.md
index d674221f0d4de2c6584d2ca68335b1caa9d1d39d..989048b0bb0d95eed7bab913a4a6927e79ecb297 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased] ##
+## [6.0.0 2023-10-17] ##
 
 This is a major update. Switching from integer ids for internal and external use to string ids for the external use while keeping the old integer ids for internal use.
 
diff --git a/doc/conf.py b/doc/conf.py
index c649f342a691a8a52fdf45654925da5b1e378533..02d6ce6b0b593134782f48314152fab8733edbd7 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -26,9 +26,9 @@ copyright = '2021, IndiScale GmbH'
 author = 'Daniel Hornung'
 
 # The short X.Y version
-version = '5.1'
+version = '6.0'
 # The full version, including alpha/beta/rc tags
-release = '5.1.0-SNAPSHOT'
+release = '6.0.0'
 
 
 # -- General configuration ---------------------------------------------------