diff --git a/README.md b/README.md
index 930d63c5dccbce4b0812a07105a8b7c05104ae5c..b4bd855e2c6199934653c3e3df087e60ce44c54e 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,8 @@ docker exec -ti rweb /bin/bash
 |30998|FRPS monitor|
 |30997|FRPC console|
 |30500-30899|FRP server dynamic ports|
+|9399|Virtualbox web interface|
+|9000-9389|Virtualbox dynamic ports|
 
 ## tw1 migration (gcp)