diff --git a/Dockerfile b/Dockerfile
index 9c3de94..937422e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:21 AS build
+FROM node:21@sha256:b9ccc4aca32eebf124e0ca0fd573dacffba2b9236987a1d4d2625ce3c162ecc8 AS build
 
 WORKDIR /app
 
@@ -10,7 +10,7 @@ COPY . .
 RUN npm run build
 RUN npm prune --production
 
-FROM node:21 AS run
+FROM node:21@sha256:b9ccc4aca32eebf124e0ca0fd573dacffba2b9236987a1d4d2625ce3c162ecc8 AS run
 
 ENV NODE_ENV=production