diff --git a/setup.py b/setup.py
index 5f52b478..58197241 100644
--- a/setup.py
+++ b/setup.py
@@ -91,7 +91,7 @@ def read(fname):
     return open(os.path.join(os.path.dirname(__file__), fname)).read()
 
 
-version = '0.4.0'
+version = '0.4.1.dev1'
 url = "https://github.com/ome/omero-metadata/"
 
 setup(