diff --git a/demo/api/requirements.txt b/demo/api/requirements.txt
index 5f26b9e..b72ef84 100644
--- a/demo/api/requirements.txt
+++ b/demo/api/requirements.txt
@@ -2,7 +2,7 @@ absl-py==0.7.1
 astor==0.7.1
 Click==7.0
 Flask==1.0.2
-Flask-Cors==3.0.7
+Flask-Cors==3.0.9
 gast==0.2.2
 grpcio==1.19.0
 h5py==2.9.0