diff --git a/examples/cloud_run_event/Dockerfile b/examples/cloud_run_event/Dockerfile
index 7fa0df13..eb9f53e0 100644
--- a/examples/cloud_run_event/Dockerfile
+++ b/examples/cloud_run_event/Dockerfile
@@ -1,6 +1,6 @@
 # Use the official Python image.
 # https://hub.docker.com/_/python
-FROM python:3.7-slim
+FROM python:3.13.3-slim
 
 # Copy local code to the container image.
 ENV APP_HOME /app