diff --git a/Dockerfile b/Dockerfile
index 9b9c01a..f89869b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Use lightweight Node.js 20 base image
-FROM node:20-alpine as builder
+FROM node:20-alpine@sha256:9bef0ef1e268f60627da9ba7d7605e8831d5b56ad07487d24d1aa386336d1944 as builder
 
 # Set working directory
 WORKDIR /app
@@ -17,7 +17,7 @@ COPY . .
 RUN npm run build
 
 # Use a minimal base image for running the app
-FROM node:20-alpine
+FROM node:20-alpine@sha256:9bef0ef1e268f60627da9ba7d7605e8831d5b56ad07487d24d1aa386336d1944
 
 WORKDIR /app