diff --git a/requirements.txt b/requirements.txt
index 0925da1..0e9808c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ connexion==1.2
 docutils==0.14
 enum34==1.1.6
 Flask==0.12.2
-Flask-Cors==3.0.3
+Flask-Cors==3.0.9
 grpcio==1.8.3
 grpcio-tools==1.8.3
 html5lib==0.9999999