diff --git a/docker/Dockerfile b/docker/Dockerfile
index f31815e..cf7db48 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -26,7 +26,12 @@
 RUN apk add ca-certificates wget su-exec git
 
 # get gitbucket
-RUN wget https://github.com/gitbucket/gitbucket/releases/download/4.24.1/gitbucket.war -O $GITBUCKET_HOME/latest.war
+RUN cd $GITBUCKET_HOME
+RUN wget https://github.com/gitbucket/gitbucket/releases/download/4.24.1/gitbucket.war
+RUN wget https://github.com/gitbucket/gitbucket/releases/download/4.24.1/gitbucket.war.sha256
+RUN echo " gitbucket.war" >> gitbucket.war.sha256
+RUN sha256sum -c gitbucket.war.sha256
+RUN mv gitbucket.war latest.war
 
 # clean
 RUN apk del wget