diff --git a/requirements.txt b/requirements.txt
index d07d7fb..43e5ea0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ Flask-SQLAlchemy==2.3.2
 Flask-WTF==0.14.2
 google-api-python-client==1.6.5
 gunicorn==19.7.1
-httplib2==0.10.3
+httplib2==0.18.0
 idna==2.6
 itsdangerous==0.24
 Jinja2==2.10