diff --git a/gravity/gravity-backend/requirements.txt b/gravity/gravity-backend/requirements.txt
index b5bcb1c..5137b38 100644
--- a/gravity/gravity-backend/requirements.txt
+++ b/gravity/gravity-backend/requirements.txt
@@ -2,7 +2,7 @@ aniso8601==1.2.0
 appdirs==1.4.0
 click==6.7
 Flask==0.12
-Flask-Cors==3.0.2
+Flask-Cors==3.0.9
 Flask-RESTful==0.3.5
 gunicorn==19.7.1
 itsdangerous==0.24