diff --git a/Dockerfile b/Dockerfile
index ac18744..8aab025 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM mirror.gcr.io/library/ubuntu:focal
+FROM mirror.gcr.io/library/ubuntu:jammy
 RUN apt-get update \
  && apt-get install -y \
     curl ca-certificates iputils-ping \