diff --git a/README.md b/README.md
index b984f32..40f882b 100644
--- a/README.md
+++ b/README.md
@@ -55,6 +55,7 @@ services:
       - "8000"
     environment:
       - VIRTUAL_HOST=whoami.local
+      - VIRTUAL_PORT=8000
 ```
 
 ```shell