diff --git a/requirements.txt b/requirements.txt
index 72283f5..f3a5889 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ decorator==4.3.0
 Deprecated==1.2.4
 docopt==0.6.2
 Flask==1.0.2
-Flask-Cors==3.0.7
+Flask-Cors==3.0.9
 gcloud==0.17.0
 googleapis-common-protos==1.5.5
 gunicorn==19.9.0