diff --git a/cmd/gocq/main.go b/cmd/gocq/main.go
index c620080..1cb85ca 100644
--- a/cmd/gocq/main.go
+++ b/cmd/gocq/main.go
@@ -365,6 +365,7 @@ func PasswordHashDecrypt(encryptedPasswordHash string, key []byte) ([]byte, erro
 
 func newClient() *client.QQClient {
 	c := client.NewClientEmpty()
+	c.UseFragmentMessage = base.ForceFragmented
 	c.OnServerUpdated(func(bot *client.QQClient, e *client.ServerUpdatedEvent) bool {
 		if !base.UseSSOAddress {
 			log.Infof("收到服务器地址更新通知, 根据配置文件已忽略.")
diff --git a/coolq/api.go b/coolq/api.go
index 44a52e8..ece7076 100644
--- a/coolq/api.go
+++ b/coolq/api.go
@@ -1470,18 +1470,18 @@ func (bot *CQBot) CQDownloadFile(url string, headers gjson.Result, threadCount i
 	h := map[string]string{}
 	if headers.IsArray() {
 		for _, sub := range headers.Array() {
-			str := strings.SplitN(sub.String(), "=", 2)
-			if len(str) == 2 {
-				h[str[0]] = str[1]
+			first, second, ok := strings.Cut(sub.String(), "=")
+			if ok {
+				h[first] = second
 			}
 		}
 	}
 	if headers.Type == gjson.String {
 		lines := strings.Split(headers.String(), "\r\n")
 		for _, sub := range lines {
-			str := strings.SplitN(sub, "=", 2)
-			if len(str) == 2 {
-				h[str[0]] = str[1]
+			first, second, ok := strings.Cut(sub, "=")
+			if ok {
+				h[first] = second
 			}
 		}
 	}
@@ -1772,12 +1772,10 @@ func (bot *CQBot) CQSetGroupAnonymousBan(groupID int64, flag string, duration in
 		return Failed(100, "INVALID_FLAG", "无效的flag")
 	}
 	if g := bot.Client.FindGroup(groupID); g != nil {
-		s := strings.SplitN(flag, "|", 2)
-		if len(s) != 2 {
+		id, nick, ok := strings.Cut(flag, "|")
+		if !ok {
 			return Failed(100, "INVALID_FLAG", "无效的flag")
 		}
-		id := s[0]
-		nick := s[1]
 		if err := g.MuteAnonymous(id, nick, duration); err != nil {
 			log.Warnf("anonymous ban error: %v", err)
 			return Failed(100, "CALL_API_ERROR", err.Error())
diff --git a/coolq/bot.go b/coolq/bot.go
index 00ec19c..aea4845 100644
--- a/coolq/bot.go
+++ b/coolq/bot.go
@@ -289,7 +289,7 @@ func (bot *CQBot) SendGroupMessage(groupID int64, m *message.SendingMessage) int
 	}
 	m.Elements = newElem
 	bot.checkMedia(newElem, groupID)
-	ret := bot.Client.SendGroupMessage(groupID, m, base.ForceFragmented)
+	ret := bot.Client.SendGroupMessage(groupID, m)
 	if ret == nil || ret.Id == -1 {
 		log.Warnf("群消息发送失败: 账号可能被风控.")
 		return -1
diff --git a/go.mod b/go.mod
index c23a948..58c1749 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.18
 
 require (
 	github.com/Microsoft/go-winio v0.5.1
-	github.com/Mrs4s/MiraiGo v0.0.0-20220405134734-9cb9e80d99d8
+	github.com/Mrs4s/MiraiGo v0.0.0-20220523030651-b28ec81f546e
 	github.com/RomiChan/syncx v0.0.0-20220320130821-c88644afda9c
 	github.com/RomiChan/websocket v1.4.3-0.20220123145318-307a86b127bc
 	github.com/fumiama/go-hide-param v0.1.4
diff --git a/server/http.go b/server/http.go
index a471011..710610d 100644
--- a/server/http.go
+++ b/server/http.go
@@ -212,9 +212,9 @@ func checkAuth(req *http.Request, token string) int {
 	if auth == "" {
 		auth = req.URL.Query().Get("access_token")
 	} else {
-		authN := strings.SplitN(auth, " ", 2)
-		if len(authN) == 2 {
-			auth = authN[1]
+		_, after, ok := strings.Cut(auth, " ")
+		if ok {
+			auth = after
 		}
 	}