diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index 5673821..9d3fab3 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -1,5 +1,5 @@
 # Multi-stage build for SvelteKit (static client + node server fallback)
-FROM node:20-alpine AS builder
+FROM node:20-bookworm-slim AS builder
 WORKDIR /app
 
 # Install deps (use package-lock if present)