diff --git a/requirements.txt b/requirements.txt
index 5675f1f..19ffdec 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ grpc-google-logging-v2==0.9.0
 grpc-google-pubsub-v1==0.9.0
 grpcio==1.0.0
 html5lib==0.999
-httplib2==0.9.2
+httplib2==0.18.0
 idna==2.1
 ipaddress==1.0.17
 lxkeymap==0.1