diff --git a/client.go b/client.go
index d1cfe03..7fb0db1 100644
--- a/client.go
+++ b/client.go
@@ -10,13 +10,6 @@ import (
 	"time"
 )
 
-const (
-	writeWait      = 10 * time.Second    // 写等待
-	pongWait       = 60 * time.Second    // 心跳等待
-	pingPeriod     = (pongWait * 9) / 10 // 心跳频率
-	maxMessageSize = 524288              // 512 kb
-)
-
 // 一个连接一个Client，负责处理连接的I/O
 type Client struct {
 	id        string
@@ -27,17 +20,19 @@ type Client struct {
 	req       *http.Request
 	mu        sync.Mutex
 	channels  map[string]struct{}
+	conf      *Config
 }
 
-func NewClient(conn *websocket.Conn, handler Handler, hub *SubscriptionHub, req *http.Request) *Client {
+func NewClient(conn *websocket.Conn, handler Handler, hub *SubscriptionHub, req *http.Request, c *Config) *Client {
 	return &Client{
 		id:        uuid.NewV4().String(),
-		writeChan: make(chan []byte, 256),
+		writeChan: make(chan []byte, c.WriteChanBuffer),
 		conn:      conn,
 		handler:   handler,
 		hub:       hub,
 		channels:  map[string]struct{}{},
 		req:       req,
+		conf:      c,
 	}
 }
 
@@ -55,10 +50,10 @@ func (c *Client) Run() {
 
 // 读取客户端发过来的内容
 func (c *Client) reader() {
-	c.conn.SetReadLimit(maxMessageSize)
-	c.conn.SetReadDeadline(time.Now().Add(pongWait))
+	c.conn.SetReadLimit(c.conf.MaxMessageSize)
+	c.conn.SetReadDeadline(time.Now().Add(c.conf.PongWait))
 	c.conn.SetPongHandler(func(string) error {
-		return c.conn.SetReadDeadline(time.Now().Add(pongWait))
+		return c.conn.SetReadDeadline(time.Now().Add(c.conf.PongWait))
 	})
 	for {
 		_, d, err := c.conn.ReadMessage()
@@ -78,18 +73,18 @@ func (c *Client) reader() {
 
 // 向客户端写入内容
 func (c *Client) writer() {
-	tik := time.NewTicker(pingPeriod)
+	tik := time.NewTicker(c.conf.PingPeriod)
 	for {
 		select {
 		case buf := <-c.writeChan:
-			c.conn.SetWriteDeadline(time.Now().Add(writeWait))
+			c.conn.SetWriteDeadline(time.Now().Add(c.conf.WriteWait))
 			err := c.conn.WriteMessage(websocket.TextMessage, buf)
 			if err != nil {
 				c.Close()
 				return
 			}
 		case <-tik.C:
-			c.conn.SetWriteDeadline(time.Now().Add(writeWait))
+			c.conn.SetWriteDeadline(time.Now().Add(c.conf.WriteWait))
 			err := c.conn.WriteMessage(websocket.PingMessage, nil)
 			if err != nil {
 				c.Close()
@@ -133,6 +128,7 @@ func (c *Client) UnsubscribeAll() {
 	for channel := range c.channels {
 		c.hub.Unsubscribe(channel, c)
 	}
+	c.channels = map[string]struct{}{}
 }
 
 // 获取已订阅的主题列表
diff --git a/config.go b/config.go
new file mode 100644
index 0000000..56c7024
--- /dev/null
+++ b/config.go
@@ -0,0 +1,22 @@
+package webreal
+
+import "time"
+
+// 客户端配置
+type Config struct {
+	WriteWait       time.Duration // 写等待时间
+	WriteChanBuffer int           // 写缓冲长度
+	PongWait        time.Duration // 心跳等待时间
+	PingPeriod      time.Duration // 心跳频率
+	MaxMessageSize  int64         // 最大消息字节数
+}
+
+func DefaultConfig() *Config {
+	return &Config{
+		WriteWait:       10 * time.Second,
+		WriteChanBuffer: 256,
+		PongWait:        60 * time.Second,
+		PingPeriod:      54 * time.Second,
+		MaxMessageSize:  524288, // 512KB
+	}
+}
diff --git a/server.go b/server.go
index 0c6edec..5e9219a 100644
--- a/server.go
+++ b/server.go
@@ -9,9 +9,10 @@ type Server struct {
 	hub      *SubscriptionHub
 	handler  Handler
 	upgrader websocket.Upgrader
+	conf     *Config
 }
 
-func NewServer(handler Handler, hub *SubscriptionHub) *Server {
+func NewServer(handler Handler, hub *SubscriptionHub, c *Config) *Server {
 	return &Server{
 		hub:     hub,
 		handler: handler,
@@ -20,6 +21,7 @@ func NewServer(handler Handler, hub *SubscriptionHub) *Server {
 				return true
 			},
 		},
+		conf: c,
 	}
 }
 
@@ -29,7 +31,7 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	if err != nil {
 		return
 	}
-	NewClient(conn, s.handler, s.hub, r).Run()
+	NewClient(conn, s.handler, s.hub, r, s.conf).Run()
 }
 
 // 使用默认的http启动监听服务
diff --git a/test/main.go b/test/main.go
index 5bbd89f..72e03e5 100644
--- a/test/main.go
+++ b/test/main.go
@@ -36,6 +36,6 @@ func main() {
 			}
 		}
 	}()
-	server := webreal.NewServer(&PushingHandler{}, hub)
+	server := webreal.NewServer(&PushingHandler{}, hub, webreal.DefaultConfig())
 	server.Run("127.0.0.1:8080", "/ws")
 }