diff --git a/Dockerfile b/Dockerfile
index 28c4e31..12c863e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -42,7 +42,7 @@
 ARG JENKINS_SHA=dc28b91e553c1cd42cc30bd75d0f651671e6de0b
 
 # Can be used to customize where jenkins.war get downloaded from
-ARG JENKINS_URL=http://repo.jenkins-ci.org/public/org/jenkins-ci/main/jenkins-war/${JENKINS_VERSION}/jenkins-war-${JENKINS_VERSION}.war
+ARG JENKINS_URL=https://repo.jenkins-ci.org/public/org/jenkins-ci/main/jenkins-war/${JENKINS_VERSION}/jenkins-war-${JENKINS_VERSION}.war
 
 # could use ADD but this one does not check Last-Modified header neither does it allow to control checksum 
 # see https://github.com/docker/docker/issues/8331