diff --git a/core/apps/interfaces.go b/core/apps/interfaces.go
index 51530bef..42fc1a99 100644
--- a/core/apps/interfaces.go
+++ b/core/apps/interfaces.go
@@ -1,26 +1,8 @@
 package apps
 
-import (
-	"github.com/crawlab-team/crawlab/core/interfaces"
-	"github.com/gin-gonic/gin"
-	"net/http"
-)
-
 type App interface {
 	Init()
 	Start()
 	Wait()
 	Stop()
 }
-
-type ApiApp interface {
-	App
-	GetGinEngine() (engine *gin.Engine)
-	GetHttpServer() (svr *http.Server)
-}
-
-type ServerApp interface {
-	App
-	GetApi() (api ApiApp)
-	GetNodeService() (masterSvc interfaces.NodeService)
-}
diff --git a/core/apps/server.go b/core/apps/server.go
index c23441bb..3724ebec 100644
--- a/core/apps/server.go
+++ b/core/apps/server.go
@@ -46,7 +46,7 @@ func (app *Server) Stop() {
 	app.api.Stop()
 }
 
-func (app *Server) GetApi() ApiApp {
+func (app *Server) GetApi() *Api {
 	return app.api
 }
 
diff --git a/core/utils/config.go b/core/utils/config.go
index d7556a44..5cb03095 100644
--- a/core/utils/config.go
+++ b/core/utils/config.go
@@ -73,11 +73,7 @@ func GetGinMode() string {
 	if res := viper.GetString("gin.mode"); res != "" {
 		return res
 	}
-	if IsDev() {
-		return gin.DebugMode
-	} else {
-		return gin.ReleaseMode
-	}
+	return gin.ReleaseMode
 }
 
 func IsPro() bool {