diff --git a/CHANGES.rst b/CHANGES.rst
index 626411f..e4a51b2 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,12 @@
 Changelog for Isso
 ==================
 
+0.10.4 (unreleased)
+-------------------
+
+- Nothing changed yet.
+
+
 0.10.3 (2016-02-24)
 -------------------
 
diff --git a/setup.py b/setup.py
index 61a28e7..3e930e9 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@ if (3, 0) <= sys.version_info < (3, 3):
 
 setup(
     name='isso',
-    version='0.10.3',
+    version='0.10.4.dev0',
     author='Martin Zimmermann',
     author_email='info@posativ.org',
     packages=find_packages(),