diff --git a/ch2_minimal_flask_server/requirements.txt b/ch2_minimal_flask_server/requirements.txt
index 1802437..18d8943 100644
--- a/ch2_minimal_flask_server/requirements.txt
+++ b/ch2_minimal_flask_server/requirements.txt
@@ -10,5 +10,5 @@ Jinja2==3.0.3
 MarkupSafe==2.0.1
 requests==2.27.1
 urllib3==1.26.8
-Werkzeug==2.0.3
+Werkzeug==2.2.3
 WTForms==3.0.1