diff --git a/requirements.txt b/requirements.txt
index 93a1fe4..86bf8d3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ Flask-OAuth==0.12
 Flask-OAuthlib==0.9.4
 Flask-SQLAlchemy==2.3.2
 Flask-WTF==0.14.2
-httplib2==0.11.3
+httplib2==0.18.0
 idna==2.6
 itsdangerous==0.24
 Jinja2==2.10