diff --git a/.env.example b/.env.example
index 32bd395..3ef0aa4 100644
--- a/.env.example
+++ b/.env.example
@@ -15,6 +15,8 @@ DB_USERNAME=toby
 DB_PASSWORD=password
 DB_ROOT_PASSWORD=example
 
+EXTERNAL_WEBSERVER_PORT=
+
 DOCKER_DEV_DB_EXTERNAL_PORT=5432
 DOCKER_DEV_DB_DATABASE=${DB_DATABASE}
 DOCKER_DEV_DB_USERNAME=${DB_USERNAME}