diff --git a/app-engine/demo-version-index/requirements.txt b/app-engine/demo-version-index/requirements.txt
index 9675853bc1..f2bcfaee36 100644
--- a/app-engine/demo-version-index/requirements.txt
+++ b/app-engine/demo-version-index/requirements.txt
@@ -2,4 +2,4 @@
 # Copyright 2022 Google LLC
 # SPDX-License-Identifier: Apache-2.0
 
-Flask==2.0.3
+Flask==2.3.2