diff --git a/CHANGES.rst b/CHANGES.rst
index fe79fe326ed5b9affdaed69b8229c8c4885326d1..bf09444ac2387b50fa64350d931d0d01211efa26 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,8 +1,8 @@
 Changes
 =======
 
-0.5.1.dev0 (unreleased)
------------------------
+0.6.dev0 (unreleased)
+---------------------
 
 - Officially support Pyhthon 3.5.
 - Tests do not depend on `pytest-cov`, `pytest-xdist` anymore.
diff --git a/setup.py b/setup.py
index 5046490416f66d4e3ae778007cb40bc19299e701..ac7d2cde9656dca4fef6b441bcef56e9c00ac484 100644
--- a/setup.py
+++ b/setup.py
@@ -43,7 +43,7 @@ docs_require = [
 
 setup(
     name="diceware",
-    version="0.5.1.dev0",
+    version="0.6.dev0",
     author="Uli Fouquet",
     author_email="uli@gnufix.de",
     description=(