diff --git a/requirements.txt b/requirements.txt
index 221a6e73..ddbc75fd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ google-cloud-core==0.28.1
 google-cloud-storage==1.11.0
 google-resumable-media==0.3.1
 googleapis-common-protos==1.5.3
-httplib2==0.11.3
+httplib2==0.18.0
 idna==2.7
 protobuf==3.6.1
 pyasn1==0.4.4