diff --git a/requirements.txt b/requirements.txt
index 6446f8b..b8d174e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ google-cloud-storage==1.13.0
 google-resumable-media==0.3.1
 googleapis-common-protos==1.5.5
 gunicorn==19.9.0
-httplib2==0.12.0
+httplib2==0.18.0
 idna==2.7
 itsdangerous==1.1.0
 Jinja2==2.10