diff --git a/docs/Response.md b/docs/Response.md
index 3b74c64..cd8ab84 100644
--- a/docs/Response.md
+++ b/docs/Response.md
@@ -53,6 +53,19 @@ cache_control = false // Turn off Cache-Control
 
 > Redirect, default 302
 
+## `writeHead([status_code = 200, headers = {}])`
+
+> Start write header.
+> Default value is internal status
+
+```js
+res.status(404).setHeader('TEST', 'CONTENT').writeHead()
+```
+
+## `write(data[, callback])`
+
+> Write body data. For (SSE)[https://developer.mozilla.org/docs/Web/API/Server-sent_events/Using_server-sent_events] or stream write.
+
 ## `end([data = '', content_type = null])`
 
 > End response, content type default `null`.
diff --git a/docs/Server.md b/docs/Server.md
index 30af4e5..9be536c 100644
--- a/docs/Server.md
+++ b/docs/Server.md
@@ -6,6 +6,8 @@
 const fastWS = require('fast-ws-server')
 const app = new fastWS({...options})
 
+app.setParam()
+
 app.any('/*', (req, res) => {
   res.end('')
 })
@@ -102,6 +104,27 @@ app.get('/*', (req, res) => {
 })
 ```
 
+## App params
+
+- `setParam(key, value)`
+- `getParam(key)`
+
+> Some options will store in params
+
+```js
+const { maxBodySize } = require('fast-ws-server/constants')
+
+app.setParam(maxBodySize, 1024) // int number in bytes
+```
+
+### Defined Consts
+
+- `maxBodySize`
+- `cache`
+- `templateEngine`
+- `trustProxy`
+  - Default: `loopback`
+
 ## Serve static file
 
 ```js