diff --git a/components/Signature/index.d.ts b/components/Signature/index.d.ts
index 4ba402a..66dbff9 100644
--- a/components/Signature/index.d.ts
+++ b/components/Signature/index.d.ts
@@ -3,8 +3,10 @@ import type { FC } from "react";
 export interface SignatureValue {
   /** 签字时间，YYYY-MM-DD HH:mm:ss */
   time: string;
-  /** 签字图片的base64编码 */
+  /** 签字图片的 base64 编码 */
   base64: string;
+  /** 签字图片的 file 对象 */
+  file: File;
 }
 
 export interface SignatureProps {