diff --git a/python/fbprophet/__init__.py b/python/fbprophet/__init__.py
index 69342c8..f19b313 100644
--- a/python/fbprophet/__init__.py
+++ b/python/fbprophet/__init__.py
@@ -7,4 +7,4 @@
 
 from fbprophet.forecaster import Prophet
 
-__version__ = '0.3'
+__version__ = '0.4.dev'