diff --git a/Dockerfile b/Dockerfile
index de449ba..923ae1c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
-# syntax=docker.io/docker/dockerfile:1
+# syntax=docker.io/docker/dockerfile:1@sha256:b6afd42430b15f2d2a4c5a02b919e98a525b785b1aaff16747d2f623364e39b6
 
-FROM node:24-alpine AS base
+FROM node:24-alpine@sha256:7e0bd0460b26eb3854ea5b99b887a6a14d665d14cae694b78ae2936d14b2befb AS base
 
 # Install dependencies only when needed
 FROM base AS deps