diff --git a/sphinx/__init__.py b/sphinx/__init__.py
index 1cdef631f..207c8f1a1 100644
--- a/sphinx/__init__.py
+++ b/sphinx/__init__.py
@@ -12,7 +12,7 @@
 import sys
 from os import path
 
-__version__ = '1.0b1'
+__version__ = '1.0b1+'
 __released__ = '1.0b1'  # used when Sphinx builds its own docs
 
 package_dir = path.abspath(path.dirname(__file__))