diff --git a/CMakeLists.txt b/CMakeLists.txt
index 618c6dd586165e4fd74f188bd7b7751656f9704c..da6a244a88b3b072e6ecd48c839101ca44428b4e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,7 +22,7 @@
 
 cmake_minimum_required(VERSION 3.13)
 
-set(liblinkahead_VERSION 0.3.0)
+set(liblinkahead_VERSION 0.4.0)
 set(liblinkahead_COMPATIBLE_SERVER_VERSION_MAJOR 0)
 set(liblinkahead_COMPATIBLE_SERVER_VERSION_MINOR 9)
 set(liblinkahead_COMPATIBLE_SERVER_VERSION_PATCH 0)
diff --git a/conanfile.py b/conanfile.py
index 304c9a7b85c9ee214aae6f567bc05bdbbf0e8f55..0b9dc099aabd3f94ff8b429bd4f0e66b8175c5c3 100644
--- a/conanfile.py
+++ b/conanfile.py
@@ -7,7 +7,7 @@ from conan.errors import ConanInvalidConfiguration
 
 class LinkAheadConan(ConanFile):
     name = "linkahead"
-    version = "0.3.0"
+    version = "0.4.0-dev"
     license = "AGPL-3.0-or-later"
     author = "Timm C. Fitschen <t.fitschen@indiscale.com>"
     url = "https://gitlab.indiscale.com/caosdb/src/caosdb-cpplib.git"
diff --git a/doc/CHANGELOG.md b/doc/CHANGELOG.md
index 10389b44d3868f4abc6c061a864140856795e2b7..34f1b17057c360db3969ccd561860b9dfd89682c 100644
--- a/doc/CHANGELOG.md
+++ b/doc/CHANGELOG.md
@@ -5,6 +5,24 @@ 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
+(Maintainer)
+
+### Added
+
+### Changed
+
+### Deprecated
+
+### Removed
+
+### Fixed
+
+### Security
+
+### Documentation
+
+
 ## [0.3.0] - 2024-11-15
 (Joscha Schmiedt)
 
diff --git a/vcpkg.json b/vcpkg.json
index a14833bd5658ef9fc11b510abf52147dcfd65bac..a86b9442d376c30f08a78e73b4935db8397298e6 100644
--- a/vcpkg.json
+++ b/vcpkg.json
@@ -1,6 +1,6 @@
 {
   "name": "liblinkahead",
-  "version-string": "0.3.0",
+  "version-string": "0.4.0-dev",
   "port-version": 1,
   "description": "C++ library for the LinkAhead project",
   "license": "AGPL-3.0-or-later",