diff --git a/.env.example b/.env.example
index c62783b..7a33236 100644
--- a/.env.example
+++ b/.env.example
@@ -21,6 +21,7 @@ DOCKER_DB_USERNAME=${DB_USERNAME}
 DOCKER_DB_PASSWORD=${DB_PASSWORD}
 DOCKER_DB_ROOT_PASSWORD=${DB_ROOT_PASSWORD}
 
+EXTERNAL_WEBSERVER_PORT=
 XDG_CONFIG_HOME=/tmp
 
 BROADCAST_DRIVER=log