diff --git a/Dockerfile b/Dockerfile
index 2f5a892..8b4b5ea 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # --- UI build stage: static JS/CSS is platform-independent ---
-FROM --platform=$BUILDPLATFORM node:20-alpine AS ui-build
+FROM --platform=$BUILDPLATFORM node:26-alpine AS ui-build
 WORKDIR /ui
 COPY ui/package.json ui/package-lock.json* ./
 RUN if [ -f package-lock.json ]; then npm ci; else npm install; fi