diff --git a/security/model-armor-demo-app/requirements.txt b/security/model-armor-demo-app/requirements.txt
index 72fddabf..ee213f88 100644
--- a/security/model-armor-demo-app/requirements.txt
+++ b/security/model-armor-demo-app/requirements.txt
@@ -1,5 +1,5 @@
 google-genai
-flask==3.0.3
+flask==3.1.3
 werkzeug==3.0.6
 python-dotenv==1.0.0
 google-cloud-modelarmor==0.1.0