diff --git a/readme-vars.yml b/readme-vars.yml
index 7ebdef0..78dc89e 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -44,6 +44,7 @@ opt_param_env_vars:
   - { env_var: "USER", env_value: "username", desc: "Specify an optional username for the interface" }
   - { env_var: "PASS", env_value: "password", desc: "Specify an optional password for the interface" }
   - { env_var: "WHITELIST", env_value: "iplist", desc: "Specify an optional list of comma separated ip whitelist. Fill rpc-whitelist setting."}
+  - { env_var: "PEERPORT", env_value: "peerport", desc: "Specify an optional port for torrent TCP/UDP connections. Fill peer-port setting."}
   - { env_var: "HOST_WHITELIST", env_value: "dnsnane list", desc: "Specify an optional list of comma separated dns name whitelist. Fill rpc-host-whitelist setting."}
 opt_param_usage_include_vols: false
 opt_param_usage_include_ports: false
@@ -75,6 +76,10 @@ app_setup_block: |
   Use `WHITELIST` to enable a list of ip as whitelist. This enable support for `rpc-whitelist`. When `WHITELIST` is empty support for whitelist is disabled.
 
   Use `HOST_WHITELIST` to enable an list of dns names as host-whitelist. This enable support for `rpc-host-whitelist`. When `HOST_WHITELIST` is empty support for host-whitelist is disabled.
+  
+  ## Use alternative Transmission torrent ports
+  
+  Use `PEERPORT` to specify the port(s) Transmission should listen on.  This disables random port selection.  This should be the same as the port mapped in your docker configuration.
 
 # changelog
 changelogs: