diff --git a/content/self-host/rustdesk-server-oss/install/_index.en.md b/content/self-host/rustdesk-server-oss/install/_index.en.md
index f09461c..67487d9 100644
--- a/content/self-host/rustdesk-server-oss/install/_index.en.md
+++ b/content/self-host/rustdesk-server-oss/install/_index.en.md
@@ -90,7 +90,7 @@ PM2 requires Node.js v16+, if you fail to run PM2 (e.g. you can not see `hbbs`/`
 The `-r` parameter of `hbbs` is not mandatory, it is just convenient for you not to specify a relay server on the controlled client side. You do not need to specify port if you are using default 21117 port. The relay server specified by the client has a higher priority than this.
 {{% /notice %}}
 
-By default, `hbbs` listens on 21115 (TCP) and 21116 (TCP/UDP), 21118 (TCP), and `hbbr` listens on 21117 (TCP), 21119 (TCP). Be sure to open these ports in the firewall. **Please note that 21116 should be enabled both for TCP and UDP**. 21115 is used for the NAT type test, 21116/UDP is used for the ID registration and heartbeat service, 21116/TCP is used for TCP hole punching and connection service, 21117 is used for the Relay services, and 21118 and 21119 are used to support web clients. *If you do not need web client (21118, 21119) support, the corresponding ports can be disabled.*
+By default, `hbbs` listens on 21115 (TCP), 21116 (TCP/UDP) and 21118 (TCP), `hbbr` listens on 21117 (TCP) and 21119 (TCP). Be sure to open these ports in the firewall. **Please note that 21116 should be enabled both for TCP and UDP.** 21115 is used for the NAT type test, 21116/UDP is used for the ID registration and heartbeat service, 21116/TCP is used for TCP hole punching and connection service, 21117 is used for the Relay services, and 21118 and 21119 are used to support web clients. *If you do not need web client (21118, 21119) support, the corresponding ports can be disabled.*
 
 - TCP (**21115, 21116, 21117, 21118, 21119**)
 - UDP (**21116**)