diff --git a/requirements.txt b/requirements.txt
index c75229e..a8471ef 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ google-api-python-client==1.7.4
 google-auth==1.5.1
 google-auth-httplib2==0.0.3
 gunicorn==19.7.1
-httplib2==0.11.3
+httplib2==0.18.0
 idna==2.7
 idna-ssl==1.1.0
 inflection==0.3.1