diff --git a/requirements.txt b/requirements.txt
index 41edcbd..cf537cb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ google-cloud-storage==1.16.1
 google-resumable-media==0.3.2
 googleapis-common-protos==1.6.0
 grpcio==1.21.1
-httplib2==0.13.0
+httplib2==0.19.0
 idna==2.8
 jws==0.1.3
 msgpack==0.6.1