diff --git a/web_app/backend/requirements.txt b/web_app/backend/requirements.txt
index d41c078a7..a1ad6e6c3 100644
--- a/web_app/backend/requirements.txt
+++ b/web_app/backend/requirements.txt
@@ -1,4 +1,4 @@
 Flask==1.0.2
 Flask-Testing==0.7.1
-flask-cors==3.0.7
+flask-cors==3.0.9
 paho-mqtt
\ No newline at end of file