diff --git a/docker-compose.yml b/docker-compose.yml
index d25abd4..d16db7e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -2,10 +2,11 @@
 
 services:
   master-jenkins:
-    image: jenkins:alpine
+    image: jenkins/jenkins:lts
     mem_limit: 2g
     environment:
-      - JAVA_OPTS="-Djava.util.logging.config.file=/var/jenkins_home/log.properties"
+      - JAVA_OPTS="-Djava.util.logging.config.file=/var/jenkins_home/log.properties ${JENKINS_ADDITIONAL_JAVA_OPTS}"
+      - TZ=${TZ}
     volumes:
       - /etc/localtime:/etc/localtime:ro
       - /etc/timezone:/etc/timezone:ro
diff --git a/jenkins.conf b/jenkins.conf
index 7357ca9..58b1980 100644
--- a/jenkins.conf
+++ b/jenkins.conf
@@ -9,8 +9,16 @@
 
 # http bind host and port
 JENKINS_HTTP_BIND=127.0.0.1
-JENKINS_HTTP_PORT=8080
+JENKINS_HTTP_PORT=8081
 
 # java api bind host and port
 JENKINS_API_BIND=127.0.0.1
 JENKINS_API_PORT=50000
+
+# additional java options like
+# -Dhudson.footerURL=http://mycompany.com
+JENKINS_ADDITIONAL_JAVA_OPTS=""
+
+
+# Timezone one of /usr/share/zoneinfo
+TZ=Europe/Berlin