diff --git a/climlab/__init__.py b/climlab/__init__.py
index <HASH>..<HASH> 100644
--- a/climlab/__init__.py
+++ b/climlab/__init__.py
@@ -1,4 +1,4 @@
-__version__ = '0.4.1'
+__version__ = '0.4.2dev'
 
 #  This list defines all the modules that will be loaded if a user invokes
 #   from climLab import *
Set version number to <I>dev