diff --git a/api/info.go b/api/info.go
index c53ee27..76750df 100644
--- a/api/info.go
+++ b/api/info.go
@@ -74,6 +74,7 @@ func GetDanmuInfo(roomID int, cookie string) (*DanmuInfo, error) {
 	result := &DanmuInfo{}
 	headers := &http.Header{}
 	headers.Set("cookie", cookie)
+	headers.Set("user-agent", "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36")
 	err := GetJsonWithHeader(fmt.Sprintf("https://api.live.bilibili.com/xlive/web-room/v1/index/getDanmuInfo?id=%d&type=0", roomID), headers, result)
 	if err != nil {
 		return nil, err
diff --git a/client/client.go b/client/client.go
index 02cd29d..a4654bf 100644
--- a/client/client.go
+++ b/client/client.go
@@ -115,6 +115,9 @@ func (c *Client) init() error {
 func (c *Client) connect() error {
 	reqHeader := &http.Header{}
 	reqHeader.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36")
+	if len(c.hostList) == 0 {
+		return errors.New("blivedm-go: no host found when connecting")
+	}
 retry:
 	c.host = c.hostList[c.retryCount%len(c.hostList)]
 	c.retryCount++
diff --git a/example/main.go b/example/main.go
index a58be65..d88c9e2 100644
--- a/example/main.go
+++ b/example/main.go
@@ -13,7 +13,7 @@ import (
 
 func main() {
 	log.SetLevel(log.DebugLevel)
-	c := client.NewClient(23943357)
+	c := client.NewClient(0)
 	c.SetCookie("")
 	//弹幕事件
 	c.OnDanmaku(func(danmaku *message.Danmaku) {