diff --git a/CHANGELOG.md b/CHANGELOG.md
index 08b4b3dc8..7bb50452e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,16 @@ 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 [Calendar Versioning](https://calver.org).
 
+## [Unreleased]
+### Added
+### Changed
+### Deprecated
+### Removed
+### Fixed
+
+[Unreleased]: https://github.com/greenbone/pontos/compare/v21.6.4...HEAD
+
+
 ## [21.6.4] - 2021-06-22
 ### Added
 * `pontos-release prepare` can be used with `--patch`, to create a release with the next patch version. [#131](https://github.com/greenbone/pontos/pull/131)
diff --git a/pontos/version/__version__.py b/pontos/version/__version__.py
index 74c18f353..ec1f98ad8 100644
--- a/pontos/version/__version__.py
+++ b/pontos/version/__version__.py
@@ -2,4 +2,4 @@
 
 # THIS IS AN AUTOGENERATED FILE. DO NOT TOUCH!
 
-__version__ = "21.6.4"
+__version__ = "21.6.5.dev1"
diff --git a/pyproject.toml b/pyproject.toml
index f3a526f33..dc7066eef 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pontos"
-version = "21.6.4"
+version = "21.6.5.dev1"
 description = "Common utilities and tools maintained by Greenbone Networks"
 authors = ["Greenbone Networks GmbH <info@greenbone.net>"]
 license = "GPL-3.0-or-later"