diff --git a/python/cloud-run-python-hello-world/requirements.txt b/python/cloud-run-python-hello-world/requirements.txt
index f3d9b380f..3c0cbcf06 100644
--- a/python/cloud-run-python-hello-world/requirements.txt
+++ b/python/cloud-run-python-hello-world/requirements.txt
@@ -1,3 +1,3 @@
-Flask==2.3.3
+Flask==3.1.3
 requests==2.31.0
 debugpy # Required for debugging.