diff --git a/eventarc/pubsub/Dockerfile b/eventarc/pubsub/Dockerfile
index fb2531e9aff..37af2df7bbb 100644
--- a/eventarc/pubsub/Dockerfile
+++ b/eventarc/pubsub/Dockerfile
@@ -16,7 +16,7 @@
 
 # Use the official Python image.
 # https://hub.docker.com/_/python
-FROM python:3.9-slim
+FROM python:3.13.5-slim
 
 # Allow statements and log messages to immediately appear in the Cloud Run logs
 ENV PYTHONUNBUFFERED True