diff --git a/CHANGES.rst b/CHANGES.rst
index 1b61490f1036de1e89ea7a313073fa9ba0ee59bb..307afd11aa5c69ef10f495fccd38dc33a1873ee7 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,12 @@
 Changes
 =======
 
+0.4.1 (unreleased)
+------------------
+
+- No changes yet.
+
+
 0.4 (2015-03-30)
 ----------------
 
diff --git a/setup.py b/setup.py
index 3dc926ecaa36db2b0776c7c66e05d2de2bfe3881..781a52bc3352d5e42b2b484602a08c15f7dd7eb2 100644
--- a/setup.py
+++ b/setup.py
@@ -40,7 +40,7 @@ docs_require = [
 
 setup(
     name="diceware",
-    version="0.4",
+    version="0.4.1.dev0",
     author="Uli Fouquet",
     author_email="uli@gnufix.de",
     description=(