diff --git a/CHANGELOG.md b/CHANGELOG.md
index 99e9a1c0d06946c679f8fe1b32f573c3876b867c..d950e343c9523d3df8a28b13533aa0c50364ada2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,12 +4,26 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased] ##
+
+### Added ###
+
+### Changed ###
+
+### Deprecated ###
+
+### Removed ###
+
+### Fixed ###
+
+### Security ###
+
 ## [0.5.0] - 2022-09-05 ##
 (Florian Spreckelsen)
 
 ### Added ###
 
-- You can now use `python -m caosadvancedtools.models.parser model_file` to 
+- You can now use `python -m caosadvancedtools.models.parser model_file` to
   parse and potentially synchronize data models.
 
 ### Deprecated ###
diff --git a/setup.py b/setup.py
index e9e87e448818d6f8960f0429e548560f9b0aef54..e5803191c2311e9018b164bc2632854106dcd4ae 100755
--- a/setup.py
+++ b/setup.py
@@ -47,9 +47,9 @@ from setuptools import find_packages, setup
 
 MAJOR = 0
 MINOR = 5
-MICRO = 0
+MICRO = 1
 PRE = ""  # e.g. rc0, alpha.1, 0.beta-23
-ISRELEASED = True
+ISRELEASED = False
 
 if PRE:
     VERSION = "{}.{}.{}-{}".format(MAJOR, MINOR, MICRO, PRE)
diff --git a/src/doc/conf.py b/src/doc/conf.py
index 9eb8c08ae5a75cb0561d20d858350b7f6db3001b..5318621687051c1af04c395681aa40ef3ac85b5c 100644
--- a/src/doc/conf.py
+++ b/src/doc/conf.py
@@ -27,9 +27,9 @@ copyright = '2021, IndiScale GmbH'
 author = 'Daniel Hornung'
 
 # The short X.Y version
-version = '0.5.0'
+version = '0.5.1'
 # The full version, including alpha/beta/rc tags
-release = '0.5.0'
+release = '0.5.1-dev'
 
 
 # -- General configuration ---------------------------------------------------