diff --git a/samples/server/petstore/python-flask/requirements.txt b/samples/server/petstore/python-flask/requirements.txt
index 2cb06891ce9f..fb5944e1aa39 100644
--- a/samples/server/petstore/python-flask/requirements.txt
+++ b/samples/server/petstore/python-flask/requirements.txt
@@ -10,4 +10,4 @@ werkzeug == 0.16.1; python_version=="3.5" or python_version=="3.4"
 swagger-ui-bundle >= 0.0.2
 python_dateutil >= 2.6.0
 setuptools >= 21.0.0
-Flask == 2.1.1
+Flask == 3.1.3