diff --git a/ch6/rest_client_ex/server/requirements.txt b/ch6/rest_client_ex/server/requirements.txt
index a30d57b6..a64b50b0 100644
--- a/ch6/rest_client_ex/server/requirements.txt
+++ b/ch6/rest_client_ex/server/requirements.txt
@@ -9,5 +9,5 @@ MarkupSafe==2.0.1
 pycodestyle==2.10.0
 tomli==1.2.3
 typing_extensions==4.1.1
-Werkzeug==2.0.3
+Werkzeug==2.2.3
 zipp==3.6.0