diff --git a/react-java-mysql/backend/Dockerfile b/react-java-mysql/backend/Dockerfile
index b1b446b..849ca34 100755
--- a/react-java-mysql/backend/Dockerfile
+++ b/react-java-mysql/backend/Dockerfile
@@ -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