diff --git a/requirements.txt b/requirements.txt
index 98ef5c19c..bfe751956 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,6 +32,7 @@ jwcrypto>=0.4.0			# for signed notifications
 mimeparse>=0.1.3		# from TastyPie
 mock>=2.0.0
 MySQL-python>=1.2.5
+oauth2client>=4.0.0		# required by google-api-python-client, but not always pulled in
 patch>=1.16,<2.0
 pathlib>=1.0
 pathlib2>=2.3.0