diff --git a/requirements.txt b/requirements.txt
index 2d204be..191a3d1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ google-api-python-client==1.6.5
 google-auth==1.4.1
 google-auth-httplib2==0.0.3
 google-auth-oauthlib==0.2.0
-httplib2==0.10.3
+httplib2==0.18.0
 idna==2.6
 oauth2client==4.1.2
 oauthlib==2.0.6