diff --git a/Dockerfile b/Dockerfile
index 56ba505..391a5a6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -23,9 +23,9 @@
 
 COPY init.groovy /usr/share/jenkins/ref/init.groovy.d/tcp-slave-agent-port.groovy
 
-ENV JENKINS_VERSION 1.622
+ENV JENKINS_VERSION 1.623
 # 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 749f403eb737e7c873c2a3760c612350a77dd275
+ENV JENKINS_SHA db873da98bddcea47e815442e28f1164442efd5a
 
 # could use ADD but this one does not check Last-Modified header 
 # see https://github.com/docker/docker/issues/8331