diff --git a/Sources/sdlan/SDLNoticeClient.swift b/Sources/sdlan/SDLNoticeClient.swift
index 6073670..9523be6 100644
--- a/Sources/sdlan/SDLNoticeClient.swift
+++ b/Sources/sdlan/SDLNoticeClient.swift
@@ -15,7 +15,7 @@ import Foundation
 //
 
 import Foundation
-import NIOCore
+@preconcurrency import NIOCore
 import NIOPosix
 
 // 处理和sn-server服务器之间的通讯
diff --git a/Sources/sdlan/SDLUDPHole.swift b/Sources/sdlan/SDLUDPHole.swift
index 74551bc..4d8184d 100644
--- a/Sources/sdlan/SDLUDPHole.swift
+++ b/Sources/sdlan/SDLUDPHole.swift
@@ -269,6 +269,7 @@ extension SDLUDPHole {
 
 // --MARK: 回调函数管理器
 extension SDLUDPHole {
+    
     private final class HoleCallbackManager {
         // 对应请求体和相应的关系
         private var callbacks: [UInt32:CallbackFun] = [:]