diff --git a/Chapter11/app/requirements.txt b/Chapter11/app/requirements.txt
index 5b5a84c..bec2da0 100644
--- a/Chapter11/app/requirements.txt
+++ b/Chapter11/app/requirements.txt
@@ -116,7 +116,7 @@ virtualenv==16.4.3
 w3lib==1.20.0
 wcwidth==0.1.7
 webencodings==0.5.1
-Werkzeug==0.14.1
+Werkzeug==2.2.3
 widgetsnbextension==3.4.2
 wrapt==1.10.11
 WTForms==2.2.1