diff --git a/tests/apps/python-flask/requirements.txt b/tests/apps/python-flask/requirements.txt
index 7299a10469f..6150b95d3dc 100644
--- a/tests/apps/python-flask/requirements.txt
+++ b/tests/apps/python-flask/requirements.txt
@@ -1,5 +1,5 @@
 Flask==0.9
 Jinja2==2.6
-Werkzeug==0.8.3
+Werkzeug==0.15.3
 gunicorn==0.17.2