diff --git a/docs/advanced/deployment.md b/docs/advanced/deployment.md
index 8a15b264..643f30a3 100644
--- a/docs/advanced/deployment.md
+++ b/docs/advanced/deployment.md
@@ -56,6 +56,7 @@ services:
       - CQHTTP_WS_REVERSE_EVENT_URL=ws://nonebot:8080/ws/event/
     depends_on:
       - nonebot
+    ports: 9000:9000
 
   nonebot:
     build: ./nonebot # 构建nonebot执行环境，Dockerfile见下面的例子