diff --git a/CHANGELOG.md b/CHANGELOG.md
index fd2e5e4c8bf90660e28c2d9615465183b6154527..4b052c63e17c19ccb73001d6c5f8fc9e5bcddcf9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,22 @@ 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 ###
+
+### Documentation ###
+
 ## [0.13.3 - 2024-04-23] ##
 
 ### Fixed ###
diff --git a/src/doc/conf.py b/src/doc/conf.py
index a94d3bde2f2cb42a56bcfbf9420e928493428ac1..67e59aaefb5e6a27509b83ef03b1ab684acc1545 100644
--- a/src/doc/conf.py
+++ b/src/doc/conf.py
@@ -26,9 +26,9 @@ copyright = '2022 - 2024, IndiScale GmbH'
 author = 'Daniel Hornung'
 
 # The short X.Y version
-version = '0.13.3'
+version = '0.13.4'
 # The full version, including alpha/beta/rc tags
-release = '0.13.3'
+release = '0.13.4-SNAPSHOT'
 
 
 # -- General configuration ---------------------------------------------------