diff --git a/types/mask.d.ts b/types/mask.d.ts
index cba20c5..7f23728 100644
--- a/types/mask.d.ts
+++ b/types/mask.d.ts
@@ -1 +1 @@
-export default function mask(value: any, mask: any, tokens: any, masked?: boolean): string;
+export default function mask(value: any, mask: any, tokens?: any, masked?: boolean): string;