diff --git a/utils/identity.go b/utils/identity.go
index d0642ee..4aa0a33 100644
--- a/utils/identity.go
+++ b/utils/identity.go
@@ -4,6 +4,7 @@ import (
 	ulid "github.com/oklog/ulid/v2"
 )
 
+// remove nanoid,uuid,replace to ulid
 func ULID() string {
 	return ulid.Make().String()
 }