diff --git a/Dockerfile b/Dockerfile
index cf66540..307cb40 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -27,12 +27,13 @@
 
 COPY init.groovy /usr/share/jenkins/ref/init.groovy.d/tcp-slave-agent-port.groovy
 
-ENV JENKINS_VERSION 1.609.2
-ENV JENKINS_SHA 59215da16f9f8a781d185dde683c05fcf11450ef
+ENV JENKINS_VERSION 1.624
+# curl http://repo.jenkins-ci.org/simple/releases/org/jenkins-ci/main/jenkins-war/${JENKINS_VERSION}/jenkins-war-${JENKINS_VERSION}.war.sha1
+ENV JENKINS_SHA b133b49c8e973525509ee2770ac1894125344e15
 
 # could use ADD but this one does not check Last-Modified header 
 # see https://github.com/docker/docker/issues/8331
-RUN curl -fL http://mirrors.jenkins-ci.org/war-stable/$JENKINS_VERSION/jenkins.war -o /usr/share/jenkins/jenkins.war \
+RUN curl -fL http://mirrors.jenkins-ci.org/war/$JENKINS_VERSION/jenkins.war -o /usr/share/jenkins/jenkins.war \
   && echo "$JENKINS_SHA /usr/share/jenkins/jenkins.war" | sha1sum -c -
 
 ENV JENKINS_UC https://updates.jenkins-ci.org