diff --git a/a11y-demo-app-004/requirements.txt b/a11y-demo-app-004/requirements.txt
index b733f8f..cdd505f 100644
--- a/a11y-demo-app-004/requirements.txt
+++ b/a11y-demo-app-004/requirements.txt
@@ -1,2 +1,2 @@
-flask==3.0.3
+flask==3.1.3
 gunicorn==22.0.0