diff --git a/documentation/installation/docker.md b/documentation/installation/docker.md
index 223a10970a0bc3dc4548769ada69a46048d07da0..5cfa93f3788d92310102395162cc2e284b1f4403 100644
--- a/documentation/installation/docker.md
+++ b/documentation/installation/docker.md
@@ -52,7 +52,7 @@ You also have to create persistent directory to store various Spectrum 2 data li
 
 To start Spectrum 2 on background using Docker, all you have to do is running following Docker command:
 
-	$ docker run --name="spectrum2" -d -v /opt/spectrum2/configuration:/etc/spectrum2/transports -v /opt/spectrum2/data:/var/lib/spectrum2 spectrum2/spectrum2
+	$ docker run --name="spectrum2" -d -p 5222:5222 -v /opt/spectrum2/configuration:/etc/spectrum2/transports -v /opt/spectrum2/data:/var/lib/spectrum2 spectrum2/spectrum2
 
 It will start Spectrum 2 and load the configuration files from `/opt/spectrum`. It also gives the spawned container name `spectrum2`.
 
@@ -75,4 +75,4 @@ To upgrade Spectrum 2 container, you at first have to pull the updated Docker im
 	$ docker pull spectrum2/spectrum2
 	$ docker stop spectrum2
 	$ docker rm spectrum2
-	$ docker run --name="spectrum2" -d -v /opt/spectrum2/configuration:/etc/spectrum2/transports -v /opt/spectrum2/data:/var/lib/spectrum2 spectrum2/spectrum2
+	$ docker run --name="spectrum2" -d -p 5222:5222 -v /opt/spectrum2/configuration:/etc/spectrum2/transports -v /opt/spectrum2/data:/var/lib/spectrum2 spectrum2/spectrum2