diff --git a/tools/pip-requires b/tools/pip-requires
index 69fa8c9fb0..b79c6d50d0 100644
--- a/tools/pip-requires
+++ b/tools/pip-requires
@@ -27,6 +27,7 @@ lxml>=2.3
 msgpack-python
 netaddr
 netifaces>=0.5
+oauth2
 oslo.config>=1.1.0
 pam>=0.1.4
 paramiko>=1.8.0