diff --git a/CHANGES.rst b/CHANGES.rst
index e40904e..912af17 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -2,6 +2,12 @@ Changelog
 =========
 
 
+1.6 (unreleased)
+----------------
+
+- Nothing changed yet.
+
+
 1.5 (2015-07-31)
 ----------------
 
diff --git a/setup.py b/setup.py
index 75404d3..e930184 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,6 @@
 from setuptools import setup, find_packages
 
-version = '1.5'
+version = '1.6.dev0'
 
 setup(name='collective.catalogcleanup',
       version=version,