diff --git a/cmd/root.go b/cmd/root.go
index 8f5f300..b64fbdf 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -21,7 +21,7 @@ var rootCmd = &cobra.Command{
 }
 
 var username, password, zkAddr, schedAddr string
-var env, role, name *string
+var env, role, name = new(string), new(string), new(string)
 var client realis.Realis
 var monitor *realis.Monitor
 var insecureSkipVerify bool