diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1a5ce7c8bc218db5278be5914c111a70f4ba6b1a..84e917f07c3b8d5a7e765210b21dd42688d62da1 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
+
 ## [0.12.2] - 2024-03-18
 
 ### Fixed
diff --git a/pom.xml b/pom.xml
index 9fe424c144419a774b53144af2d0f977d7ea50e2..a8efcdbadd335a27d4a8a3a05adad46883bb2c73 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>0.12.2</version>
+  <version>0.12.3-SNAPSHOT</version>
   <packaging>jar</packaging>
   <name>CaosDB Server</name>
   <scm>
diff --git a/src/doc/conf.py b/src/doc/conf.py
index a8167d4da6cc24865aba836056f2c5da58eec880..18feeb73ba20a435ce0a9a39aeda0bcca4e302f1 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 = '0.12.2'
+version = '0.12.3'
 # The full version, including alpha/beta/rc tags
-release = '0.12.2'
+release = '0.12.3-SNAPSHOT'
 
 
 # -- General configuration ---------------------------------------------------