diff --git a/flask/flask_multi-route/requirements.txt b/flask/flask_multi-route/requirements.txt
index 1b9934f..1cf17e6 100644
--- a/flask/flask_multi-route/requirements.txt
+++ b/flask/flask_multi-route/requirements.txt
@@ -1,6 +1,6 @@
 autopep8==1.5.3
 click==7.1.2
-Flask==1.1.2
+Flask==2.3.2
 gunicorn==20.0.4
 itsdangerous==1.1.0
 Jinja2==2.11.3