diff --git a/requirements.txt b/requirements.txt
index 22a9760..355951c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ 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
 joblib==0.15.1
 lazy==1.3