diff --git a/docker/test-ubuntu.dockerfile b/docker/test-ubuntu.dockerfile
index 2e64d86a..1cb27bd4 100644
--- a/docker/test-ubuntu.dockerfile
+++ b/docker/test-ubuntu.dockerfile
@@ -1,6 +1,6 @@
 FROM node:20-slim@sha256:f93745c153377ee2fbbdd6e24efcd03cd2e86d6ab1d8aa9916a3790c40313a55 AS node-base
 
-FROM ubuntu:22.04@sha256:eb29ed27b0821dca09c2e28b39135e185fc1302036427d5f4d70a41ce8fd7659
+FROM ubuntu:26.04@sha256:b7f48194d4d8b763a478a621cdc81c27be222ba2206ca3ca6bc42b49685f3d9e
 
 # Copy Node.js from official image (avoids curl|bash install pattern)
 COPY --from=node-base /usr/local/bin/node /usr/local/bin/node