diff --git a/Dockerfile b/Dockerfile
index 6191287..983cb7b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM adoptopenjdk:8-jre-hotspot
 
 LABEL maintainer="Naoki Takezoe <takezoe [at] gmail.com>"
 
-ADD https://github.com/gitbucket/gitbucket/releases/download/4.39.0/gitbucket.war /opt/gitbucket.war
+ADD https://github.com/gitbucket/gitbucket/releases/download/4.40.0/gitbucket.war /opt/gitbucket.war
 
 RUN ln -s /gitbucket /root/.gitbucket