diff --git a/chapter-9/chapter-9-flask-app/requirements.txt b/chapter-9/chapter-9-flask-app/requirements.txt
index 8b776f0..9e66ffb 100644
--- a/chapter-9/chapter-9-flask-app/requirements.txt
+++ b/chapter-9/chapter-9-flask-app/requirements.txt
@@ -7,7 +7,7 @@ Jinja2==3.1.2
 MarkupSafe==2.1.2
 pymongo==4.3.3
 typing_extensions==4.5.0
-Werkzeug==2.2.3
+Werkzeug==3.0.1
 zipp==3.14.0
 prometheus-client==0.16.0
 prometheus-flask-exporter==0.22.3