diff --git a/iap/app_engine_app/requirements.txt b/iap/app_engine_app/requirements.txt
index 6857fdf317..3954d17e73 100644
--- a/iap/app_engine_app/requirements.txt
+++ b/iap/app_engine_app/requirements.txt
@@ -1,2 +1,2 @@
-Flask==3.0.3
+Flask==3.1.3
 Werkzeug==3.1.4
diff --git a/iap/requirements.txt b/iap/requirements.txt
index 850043f7bd..c0d103f39e 100644
--- a/iap/requirements.txt
+++ b/iap/requirements.txt
@@ -1,5 +1,5 @@
 cryptography==45.0.1
-Flask==3.0.3
+Flask==3.1.3
 google-auth==2.38.0
 gunicorn==23.0.0
 requests==2.32.4