diff --git a/react-java-mysql/backend/Dockerfile b/react-java-mysql/backend/Dockerfile
index 27d6367..b1b446b 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