diff --git a/requirements.txt b/requirements.txt
index 21d5aa2..ebbb409 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ google-api-python-client==1.7.8
 google-auth==1.6.3
 google-auth-httplib2==0.0.3
 google-auth-oauthlib==0.3.0
-httplib2==0.12.1
+httplib2==0.18.0
 idna==2.8
 oauthlib==3.0.1
 pkg-resources==0.0.0