diff --git a/requirements.txt b/requirements.txt
index dc4a920..d0fac85 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ 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
 itsdangerous==0.24
 Jinja2==2.10