diff --git a/requirements.txt b/requirements.txt
index a137d11..15d0626 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ googleapis-common-protos==1.5.3
 grpc-google-logging-v2==0.8.1
 grpc-google-pubsub-v1==0.8.1
 grpcio==1.8.4
-httplib2==0.10.3
+httplib2==0.19.0
 idna==2.5
 ipaddress==1.0.18
 jws==0.1.3