diff --git a/CHANGES.txt b/CHANGES.txt
index 97dc5f5..64925fb 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,6 +1,12 @@
 Changelog
 =========
 
+2.2.4 (unreleased)
+------------------
+
+- Nothing changed yet.
+
+
 2.2.3 (2013-01-13)
 ------------------
 
diff --git a/setup.py b/setup.py
index 42d7a01..01e80ca 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,6 @@
 from setuptools import setup, find_packages
 
-version = '2.2.3'
+version = '2.2.4.dev0'
 
 install_requires = [
     'setuptools',