diff --git a/setup.py b/setup.py
index 9af536b..31f66b1 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 # note only the contents of the "bucket_manager" folder are installable
 setup(
     name='bucket-manager',
-    version='0.4.0',
+    version='0.4.0.dev1',
     packages=find_packages(),
     description='Helper functions for using an s3 bucket',
     author='Dave McKay',