diff --git a/setup.py b/setup.py
index f463f624a8561..8e36c5c79db43 100644
--- a/setup.py
+++ b/setup.py
@@ -54,6 +54,7 @@ def get_git_sha():
         'boto3>=1.4.6',
         'celery',
         'colorama',
+        'contextlib2',
         'cryptography',
         'flask<1.0.0',
         'flask-appbuilder',