diff --git a/common.go b/common.go
index a002aa5..30ddf39 100644
--- a/common.go
+++ b/common.go
@@ -11,7 +11,7 @@ type DelayMsgBody struct {
 	Exchange string
 	Key      string
 	Data     string
-	Delay    int
+	Delay    int64
 }
 type MsgSend struct {
 	Result string
diff --git a/send_delay.go b/send_delay.go
index 0ecb0f7..413a3e1 100644
--- a/send_delay.go
+++ b/send_delay.go
@@ -11,7 +11,7 @@ import (
 	"github.com/golang/protobuf/proto"
 )
 
-func SendDelay(exchange, key string, data interface{}, delay int, url ...string) (*MsgSend, error) {
+func SendDelay(exchange, key string, data interface{}, delay int64, url ...string) (*MsgSend, error) {
 
 	conn, err := rpc_server_conn(url...)
 	if err != nil {