diff --git a/socket/src/main/kotlin/cn/tursom/datagram/broadcast/BroadcastServer.kt b/socket/src/main/kotlin/cn/tursom/datagram/broadcast/BroadcastServer.kt
index b20fcd7..b5e11a8 100644
--- a/socket/src/main/kotlin/cn/tursom/datagram/broadcast/BroadcastServer.kt
+++ b/socket/src/main/kotlin/cn/tursom/datagram/broadcast/BroadcastServer.kt
@@ -1,13 +1,10 @@
 package cn.tursom.datagram.broadcast
 
-import cn.tursom.core.toUTF8String
 import cn.tursom.datagram.UdpPackageSize.LANNetLen
-import java.lang.Thread.sleep
 import java.net.DatagramPacket
 import java.net.DatagramSocket
 import java.net.InetAddress
 import java.util.*
-import kotlin.concurrent.thread
 
 class BroadcastServer(val port: Int, val bufSize: Int = LANNetLen) {
   private val socket = DatagramSocket()