diff --git a/config/viper.go b/config/viper.go
index b66c7e8..6c0754d 100644
--- a/config/viper.go
+++ b/config/viper.go
@@ -8,6 +8,9 @@ import (
 )
 
 type Config struct {
+	Threads int `toml:"threads" mapstructure:"threads"`
+	Workers int `toml:"workers" mapstructure:"workers"`
+
 	Temp     tempConfig     `toml:"temp" mapstructure:"temp"`
 	Log      logConfig      `toml:"log" mapstructure:"log"`
 	DB       dbConfig       `toml:"db" mapstructure:"db"`
@@ -72,6 +75,9 @@ func Init() {
 	viper.AddConfigPath(".")
 	viper.SetConfigType("toml")
 
+	viper.SetDefault("threads", 3)
+	viper.SetDefault("workers", 3)
+
 	viper.SetDefault("temp.base_path", "cache/")
 	viper.SetDefault("temp.cache_ttl", 3600)
 
diff --git a/core/core.go b/core/core.go
index 3c19dab..fd2a09f 100644
--- a/core/core.go
+++ b/core/core.go
@@ -24,6 +24,7 @@ func processPendingTask(task types.Task) error {
 	bot.Client.EditMessage(task.ChatID, task.ReplyMessageID, "正在下载文件...")
 	dest, err := message.Download(&telegram.DownloadOptions{
 		FileName: common.GetCacheFilePath(task.FileName),
+		Threads:  config.Cfg.Threads,
 		// ProgressCallback: func(totalBytes, downloadedBytes int64) {},
 	})
 	if err != nil {
@@ -90,8 +91,8 @@ func worker(queue *queue.TaskQueue, semaphore chan struct{}) {
 
 func Run() {
 	logger.L.Info("Start processing tasks...")
-	semaphore := make(chan struct{}, 3)
-	for i := 0; i < 3; i++ {
+	semaphore := make(chan struct{}, config.Cfg.Workers)
+	for i := 0; i < config.Cfg.Workers; i++ {
 		go worker(queue.Queue, semaphore)
 	}
 }