diff --git a/requirements.txt b/requirements.txt
index d8b5ff4..ac588ae 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ 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
 ipaddress==1.0.17
 itsdangerous==1.1.0