diff --git a/python-flask-server/requirements.txt b/python-flask-server/requirements.txt
index 6292ca1..0a759c8 100644
--- a/python-flask-server/requirements.txt
+++ b/python-flask-server/requirements.txt
@@ -1,6 +1,6 @@
 connexion==1.5.3
 flask==1.0.3
-flask-cors==3.0.7
+flask-cors==3.0.9
 cirpy==1.0.2
 packaging==19.0
 appdirs==1.4.3