diff --git a/CHANGELOG.md b/CHANGELOG.md
index 22e9479e55812df2e59f36fa8d04e3028641763b..01ad67ac0ea431cde6afcceb4d2429ec90559d50 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,20 @@ 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]
+
+### Added
+
+### Changed
+
+### Deprecated
+
+### Removed
+
+### Fixed
+
+### Security
+
 ## [0.12.1] - 2023-12-13
 (Timm Fitschen)
 
diff --git a/pom.xml b/pom.xml
index 82ac0c1eb15525d5621a6fc374728543bf960842..abe5e2827883f9445f02505294881134aefb4c1f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -25,7 +25,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.caosdb</groupId>
   <artifactId>caosdb-server</artifactId>
-  <version>0.12.1</version>
+  <version>0.13.0-SNAPSHOT</version>
   <packaging>jar</packaging>
   <name>CaosDB Server</name>
   <scm>
diff --git a/src/doc/conf.py b/src/doc/conf.py
index e1471488b869d1a4896bea774bade2c82b7ed26e..530d8d653c6946b1c64738d7ad129f43d00afa8e 100644
--- a/src/doc/conf.py
+++ b/src/doc/conf.py
@@ -26,9 +26,9 @@ copyright = '2023, IndiScale GmbH'
 author = 'Daniel Hornung, Timm Fitschen'
 
 # The short X.Y version
-version = '0.12.1'
+version = '0.13.0'
 # The full version, including alpha/beta/rc tags
-release = '0.12.1'
+release = '0.13.0-dev'
 
 
 # -- General configuration ---------------------------------------------------