diff --git a/requirements.txt b/requirements.txt
index 13d23ff2df5324cbdfbb77e03c4a211d77101f6a..b06907e4c054c7dd5f3eba8449fe24c5e555fd83 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,7 @@
 js2py
 pyquery
-flask==2.2.2
+flask==2.0.3;python_version < '3.7'
+flask==2.2.2;python_version >= '3.7'
 flask_migrate
 flask-sqlalchemy==2.5.1
 requests