diff --git a/tests/apps/python-flask/requirements.txt b/tests/apps/python-flask/requirements.txt
index 764564e23..15684d447 100644
--- a/tests/apps/python-flask/requirements.txt
+++ b/tests/apps/python-flask/requirements.txt
@@ -1,5 +1,5 @@
 Flask==2.3.2
 Jinja2==3.1.2
 Werkzeug==2.3.6
-gunicorn==20.1.0
+gunicorn==21.1.0