diff --git a/doc/docs/websocket.md b/doc/docs/websocket.md
index 6e0e0db46a08918489066fa915c4798305fae7b9..6152545b08683c33302c474a2c4a33f6c49e57ea 100644
--- a/doc/docs/websocket.md
+++ b/doc/docs/websocket.md
@@ -4,6 +4,14 @@ Jboot 内置了 Undertow 服务器，完美支持 websocket 功能， tomcat8 
 
 在使用 websocket 之前，需要添加如下配置：
 
+```
+<dependency>
+    <groupId>javax.annotation</groupId>
+    <artifactId>javax.annotation-api</artifactId>
+    <version>1.3.2</version>
+</dependency>
+```
+
 ```
 jboot.web.webSocketEndpoint=your-endpoint-class-name
 ```