diff --git a/boto/__init__.py b/boto/__init__.py
index 2503ce040a..64c3910379 100644
--- a/boto/__init__.py
+++ b/boto/__init__.py
@@ -31,7 +31,7 @@
 import urlparse
 from boto.exception import InvalidUriError
 
-__version__ = '2.2.0'
+__version__ = '2.2.0-dev'
 Version = __version__ # for backware compatibility
 
 UserAgent = 'Boto/%s (%s)' % (__version__, sys.platform)