diff --git a/deb/Dockerfile b/deb/Dockerfile
index d225daf..8aa8bc7 100644
--- a/deb/Dockerfile
+++ b/deb/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:bionic
+FROM ubuntu:jammy
 LABEL maintainer="Xiaonan Shen <s@sxn.dev>"
 
 EXPOSE 25/tcp