diff --git a/react-java-mysql/backend/Dockerfile b/react-java-mysql/backend/Dockerfile
index 27d6367..849ca34 100755
--- a/react-java-mysql/backend/Dockerfile
+++ b/react-java-mysql/backend/Dockerfile
@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1.4
 
-FROM --platform=$BUILDPLATFORM maven:3.8.5-eclipse-temurin-17 AS builder
+FROM --platform=$BUILDPLATFORM maven:3.8.5-eclipse-temurin-17@sha256:a554849fd74b733acb76379bd7df0ea26635a48ab9b54ede1e94bbeaaf448cf6 AS builder
 WORKDIR /workdir/server
 COPY pom.xml /workdir/server/pom.xml
 RUN mvn dependency:go-offline
@@ -29,7 +29,7 @@ RUN mkdir -p target/dependency
 WORKDIR /workdir/server/target/dependency
 RUN jar -xf ../*.jar
 
-FROM eclipse-temurin:17-jre-focal
+FROM eclipse-temurin:17-jre-focal@sha256:55c1ff40a91898c456dc5a874a66db17b6aa1b4aef8d9cac1ad3b194575638a1
 
 EXPOSE 8080
 VOLUME /tmp