diff --git a/requirements.txt b/requirements.txt
index f2014fc..327088a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ google-api-python-client==1.7.11
 google-auth==1.6.3
 google-auth-httplib2==0.0.3
 google-auth-oauthlib==0.4.1
-httplib2==0.14.0
+httplib2==0.18.0
 idna==2.8
 itsdangerous==1.1.0
 Jinja2==2.10.3