diff --git a/buildcat/__init__.py b/buildcat/__init__.py
index a9a23d6..c87b05c 100644
--- a/buildcat/__init__.py
+++ b/buildcat/__init__.py
@@ -14,7 +14,7 @@
 
 """Provides the Buildcat public API, for use by clients and integrations."""
 
-__version__ = "0.4.0"
+__version__ = "0.5.0-dev"
 
 import functools
 import getpass