diff --git a/translation_caching/requirements.txt b/translation_caching/requirements.txt
index e98f40a..e4c46ef 100644
--- a/translation_caching/requirements.txt
+++ b/translation_caching/requirements.txt
@@ -45,7 +45,7 @@ google-resumable-media==0.3.1
 googleapis-common-protos==1.5.3
 grpc-google-iam-v1==0.11.4
 grpcio==1.8.2
-httplib2==0.10.3
+httplib2==0.18.0
 idna==2.6
 kombu==4.1.0
 oauth2client==3.0.0