diff --git a/README.md b/README.md
index 90835c9..7f8c8ec 100644
--- a/README.md
+++ b/README.md
@@ -104,6 +104,7 @@ services:
       - PASS=password #optional
       - WHITELIST=iplist #optional
       - HOST_WHITELIST=dnsnane list #optional
+      - PEERPORT=51413 #optional
     volumes:
       - <path to data>:/config
       - <path to downloads>:/downloads
@@ -128,6 +129,7 @@ docker run -d \
   -e PASS=password `#optional` \
   -e WHITELIST=iplist `#optional` \
   -e HOST_WHITELIST=dnsnane list `#optional` \
+  -e PEERPORT=51413 `#optional` \
   -p 9091:9091 \
   -p 51413:51413 \
   -p 51413:51413/udp \
@@ -155,6 +157,7 @@ Container images are configured using parameters passed at runtime (such as thos
 | `-e PASS=password` | Specify an optional password for the interface |
 | `-e WHITELIST=iplist` | Specify an optional list of comma separated ip whitelist. Fill rpc-whitelist setting. |
 | `-e HOST_WHITELIST=dnsnane list` | Specify an optional list of comma separated dns name whitelist. Fill rpc-host-whitelist setting. |
+| `-e PEERPORT=51413` | Specify an optional alternative port for Tranmission to listen for TCP/UDP connections on.. Fill peer-port and disables peer-port-random-on-start settings. |
 | `-v /config` | Where transmission should store config files and logs. |
 | `-v /downloads` | Local path for downloads. |
 | `-v /watch` | Watch folder for torrent files. |