diff --git a/cmd/root.go b/cmd/root.go
index 40ebfd81..f641a609 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -78,6 +78,9 @@ func L(words string) string {
 	return words
 }
 
+// RootCmd export the rootCmd to support customized commands when use yao as lib
+var RootCmd = rootCmd
+
 var rootCmd = &cobra.Command{
 	Use:   share.BUILDNAME,
 	Short: "Yao App Engine",