diff --git a/docs/conf.py b/docs/conf.py
index <HASH>..<HASH> 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -51,9 +51,9 @@ copyright = u'2011, Marc Brinkmann'
 # built documents.
 #
 # The short X.Y version.
-version = '0.4'
+version = '0.5'
 # The full version, including alpha/beta/rc tags.
-release = '0.4dev'
+release = '0.5dev'
 
 # The language for content autogenerated by Sphinx. Refer to documentation for
 # a list of supported languages.
diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@ def read(fname):
 
 setup(
     name='Flask-KVSession',
-    version='0.4dev',
+    version='0.5dev',
     url='https://github.com/mbr',
     license='MIT',
     author='Marc Brinkmann',
Next version will be <I>.