diff --git a/setup.py b/setup.py
index 9ef421c1..f36c27c3 100644
--- a/setup.py
+++ b/setup.py
@@ -77,7 +77,7 @@ except ImportError:
 # Take a look at http://www.python.org/dev/peps/pep-0386/
 # for a consistent versioning pattern.
 
-PSYCOPG_VERSION = '2.5'
+PSYCOPG_VERSION = '2.6.dev0'
 
 version_flags   = ['dt', 'dec']