diff --git a/README.md b/README.md
index 4dd0832..2f26d73 100644
--- a/README.md
+++ b/README.md
@@ -7,18 +7,22 @@ twitter, chat and e-mails. It is distributed under the GNU AFFERO General Public
 10.x. Do you receive many e-mails and want to answer them with a team of agents?
 You're going to love Zammad!
 
+
 ## What is zammad-docker-compose repo for?
 
 This repo is meant to be the starting point for somebody who likes to use dockerized multi-container Zammad in production.
 
+
 ## Getting started with zammad-docker-compose
 
 https://docs.zammad.org/en/latest/install-docker-compose.html
 
+
 ## Build Status
 
 [![Build Status](https://travis-ci.org/zammad/zammad-docker-compose.svg?branch=master)](https://travis-ci.org/zammad/zammad-docker-compose)
 
+
 ## Using a reverse proxy
 
 In environments with more then one web applications it is necessary to use a reverse proxy to route connections to port 80 and 443 to the right application.
@@ -32,3 +36,8 @@ To run Zammad behind a revers proxy, we provide `docker-compose.proxy-example.ym
 See `.examples/proxy/docker-compose.yml` for an example proxy project.
 
 Like this, you can add your `docker-compose.prod.yml` to a branch of your Git repository and stay up to date by merging changes to your branch.
+
+
+## Using Rancher
+
+* RANCHER_URL=http://RANCHER_HOST:8080 rancher-compose --env-file=.env up
diff --git a/docker-compose.override.yml b/docker-compose.override.yml
index c80a6f1..22e5cc4 100644
--- a/docker-compose.override.yml
+++ b/docker-compose.override.yml
@@ -1,4 +1,4 @@
-version: '3.3'
+version: '2'
 services:
 
   zammad-nginx:
diff --git a/docker-compose.yml b/docker-compose.yml
index 158eadb..9eec6aa 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,4 +1,4 @@
-version: '3.3'
+version: '2'
 
 services: