diff --git a/courses/developingapps/python/pubsub-languageapi-spanner/bonus/requirements.txt b/courses/developingapps/python/pubsub-languageapi-spanner/bonus/requirements.txt
index 2bf13b38ce..8416d090fd 100644
--- a/courses/developingapps/python/pubsub-languageapi-spanner/bonus/requirements.txt
+++ b/courses/developingapps/python/pubsub-languageapi-spanner/bonus/requirements.txt
@@ -1,4 +1,4 @@
-Flask==0.12.2
+Flask==2.3.2
 google-cloud==0.32.0
 google-cloud-core==0.28.0
 google-cloud-pubsub==0.30.1