diff --git a/CHANGES.txt b/CHANGES.txt
index 75cb7ed..bc0149b 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,6 +1,11 @@
 ``zope.sequencesort`` Changelog
 ===============================
 
+4.0.2 (unreleased)
+------------------
+
+- TBD
+
 4.0.1 (2013-03-04)
 ------------------
 
diff --git a/setup.py b/setup.py
index ae16bae..3f9f063 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,7 @@ def read(*rnames):
     return open(os.path.join(os.path.dirname(__file__), *rnames)).read()
 
 setup(name="zope.sequencesort",
-      version = '4.0.1',
+      version = '4.0.2dev',
       author='Zope Foundation and Contributors',
       author_email='zope-dev@zope.org',
       description='Sequence Sorting',