diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c89bcc0302a6588280f04fbbbe53da7812a9908..55a27c858c37be19837af469c03bbcfdf76b932a 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
+
 ## [0.12.3] - 2024-09-25
 
 ### Fixed
diff --git a/pom.xml b/pom.xml
index 351993fed71b425de6045e49bf4a2b4138eda20f..d3623577c15fe09b0c98df31883e66f666aeb3f8 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>0.12.3</version>
+  <version>0.12.4-SNAPSHOT</version>
   <packaging>jar</packaging>
   <name>CaosDB Server</name>
   <scm>
diff --git a/src/doc/conf.py b/src/doc/conf.py
index 529b5ff9c4152106b869b2f731b6eafd3e031fbf..3a0536f0ef46a8302a7c06e47b5ea81cdeab2a0e 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 = '0.12.3'
+version = '0.12.4'
 # The full version, including alpha/beta/rc tags
-release = '0.12.3'
+release = '0.12.4-SNAPSHOT'
 
 
 # -- General configuration ---------------------------------------------------