diff --git a/sphinx/__init__.py b/sphinx/__init__.py
index 4b43b29a2..8c1ebed56 100644
--- a/sphinx/__init__.py
+++ b/sphinx/__init__.py
@@ -12,7 +12,7 @@
 import sys
 from os import path
 
-__version__ = '1.0'
+__version__ = '1.0+'
 __released__ = '1.0'  # used when Sphinx builds its own docs
 
 package_dir = path.abspath(path.dirname(__file__))