diff --git a/tests/apps/multi/requirements.txt b/tests/apps/multi/requirements.txt
index 11f7dc721..f3132413a 100644
--- a/tests/apps/multi/requirements.txt
+++ b/tests/apps/multi/requirements.txt
@@ -1,2 +1,2 @@
-Flask==1.1.2
+Flask==2.0.0
 gunicorn==20.1.0