diff --git a/samples/web-app-custom-image/python/src/requirements.txt b/samples/web-app-custom-image/python/src/requirements.txt
index 22ac75b..af266d2 100644
--- a/samples/web-app-custom-image/python/src/requirements.txt
+++ b/samples/web-app-custom-image/python/src/requirements.txt
@@ -1 +1 @@
-Flask==3.1.0
+Flask==3.1.3