diff --git a/setup.py b/setup.py
index 0dabdb6..1baabd8 100644
--- a/setup.py
+++ b/setup.py
@@ -29,7 +29,7 @@
 
 setup(
     name='google-auth',
-    version='0.3.2',
+    version='0.4.0',
     author='Google Cloud Platform',
     author_email='jonwayne+google-auth@google.com',
     description='Google Authentication Library',