diff --git a/ebook/08.1.md b/ebook/08.1.md
index 99ab2c76..1e22a96e 100644
--- a/ebook/08.1.md
+++ b/ebook/08.1.md
@@ -256,7 +256,7 @@ Go语言中通过net包中的`DialTCP`函数来建立一个TCP连接，并返回
 	func handleClient(conn net.Conn) {
 		conn.SetReadDeadline(time.Now().Add(2 * time.Minute)) // set 2 minutes timeout
 		request := make([]byte, 128) // set maxium request length to 128KB to prevent flood attack
-		
+		defer conn.Close()  // close connection before exit
 		for {
 			read_len, err := conn.Read(request)