diff --git a/greenback/_version.py b/greenback/_version.py
index 0fd7f5c..89f071b 100644
--- a/greenback/_version.py
+++ b/greenback/_version.py
@@ -1,3 +1,3 @@
 # This file is imported from __init__.py and exec'd from setup.py
 
-__version__ = "1.2.1"
+__version__ = "1.2.1+dev"