diff --git a/requirements.txt b/requirements.txt
index 019a23e68d..8dc6bbb05d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,7 +23,7 @@ docutils==0.14
 enum34==1.1.6
 Flask==1.0.1
 Flask-Bcrypt==0.7.1
-Flask-Cors==3.0.4
+Flask-Cors==3.0.9
 Flask-HTTPAuth==3.1.2
 Flask-JWT==0.3.2
 flask-marshmallow==0.6.2