diff --git a/examples/zoo_app/requirements.txt b/examples/zoo_app/requirements.txt
index 4ba87b60..4176fd55 100644
--- a/examples/zoo_app/requirements.txt
+++ b/examples/zoo_app/requirements.txt
@@ -10,5 +10,5 @@ MarkupSafe==2.0.1
 pyrsistent==0.17.3
 pytz==2021.1
 six==1.16.0
-Werkzeug==1.0.1
+Werkzeug==2.2.3