diff --git a/tests/apps/python-flask/requirements.txt b/tests/apps/python-flask/requirements.txt
index 7299a10469f..acde3e3e6ae 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
-gunicorn==0.17.2
+gunicorn==19.5.0