diff --git a/examples/package/host_ubuntu.Dockerfile b/examples/package/host_ubuntu.Dockerfile
index 3cab812b..875690f6 100644
--- a/examples/package/host_ubuntu.Dockerfile
+++ b/examples/package/host_ubuntu.Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.04
+FROM ubuntu:26.04
 LABEL maintainer "Motoki TAKENAKA <m.takenaka@ntt.com>"
 
 SHELL ["/bin/bash", "-c"]