diff --git a/app.go b/app.go
index 3c10b90..2155839 100644
--- a/app.go
+++ b/app.go
@@ -119,7 +119,7 @@ func (this *app) init(userApp UserApp) {
 	this.ginEngine = gin.New()
 	this.ginEngine.Use(gin.Recovery())
 	this.userApp.Init()
-	go this.ginEngine.Run(fmt.Sprintf(":%s", this.userApp.GetHttpListenPort()))
+	go this.ginEngine.Run(fmt.Sprintf(":%d", this.userApp.GetHttpListenPort()))
 }
 
 func (this *app) unInit() {