diff --git a/setup.py b/setup.py
index d3a46dd..104b5e1 100644
--- a/setup.py
+++ b/setup.py
@@ -29,7 +29,7 @@
 
 setup(
     name = 'zope.testbrowser',
-    version = '3.6.0b1',
+    version = '3.6.0b1dev',
     url = 'http://pypi.python.org/pypi/zope.testbrowser',
     license = 'ZPL 2.1',
     description = 'Programmable browser for functional black-box tests',