diff --git a/app-engine/shaka-player-demo/requirements.txt b/app-engine/shaka-player-demo/requirements.txt
index ddc9d6f20..3b19b734d 100644
--- a/app-engine/shaka-player-demo/requirements.txt
+++ b/app-engine/shaka-player-demo/requirements.txt
@@ -2,4 +2,4 @@
 # Copyright 2022 Google LLC
 # SPDX-License-Identifier: Apache-2.0
 
-Flask==2.2.5
+Flask==3.1.3