diff --git a/requirements.txt b/requirements.txt
index 7a461f2..45d1f29 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,7 +38,7 @@ google-resumable-media==0.3.1
 googleapis-common-protos==1.5.3
 grpc-google-iam-v1==0.11.4
 grpcio==1.7.0
-httplib2==0.10.3
+httplib2==0.18.0
 idna==2.6
 monotonic==1.3
 oauth2client==3.0.0