diff --git a/lib/service/wechat/WechatPublic.d.ts b/lib/service/wechat/WechatPublic.d.ts
index aaa1621..c88a0f8 100644
--- a/lib/service/wechat/WechatPublic.d.ts
+++ b/lib/service/wechat/WechatPublic.d.ts
@@ -86,7 +86,7 @@ export declare class WechatPublicInstance {
     signatureJsSDK(options: {
         url: string;
     }): Promise<{
-        signature: any;
+        signature: string;
         noncestr: string;
         timestamp: number;
         appId: string;
diff --git a/lib/service/wechat/WechatPublic.js b/lib/service/wechat/WechatPublic.js
index bbe8ec7..7f05683 100644
--- a/lib/service/wechat/WechatPublic.js
+++ b/lib/service/wechat/WechatPublic.js
@@ -5,7 +5,6 @@ var tslib_1 = require("tslib");
 require('../../fetch');
 var crypto_1 = tslib_1.__importDefault(require("crypto"));
 var buffer_1 = require("buffer");
-var sha1 = require('sha1');
 var WechatPublicInstance = /** @class */ (function () {
     function WechatPublicInstance(appId, appSecret, accessToken, externalRefreshFn) {
         this.appId = appId;
@@ -523,7 +522,10 @@ var WechatPublicInstance = /** @class */ (function () {
                             zhimaString += contentArray[ele];
                         });
                         return [2 /*return*/, {
-                                signature: sha1(zhimaString),
+                                signature: crypto_1.default
+                                    .createHash('sha1')
+                                    .update(zhimaString)
+                                    .digest('hex'),
                                 noncestr: noncestr,
                                 timestamp: timestamp,
                                 appId: this.appId,
diff --git a/package.json b/package.json
index c516486..4579322 100644
--- a/package.json
+++ b/package.json
@@ -18,13 +18,11 @@
         "@types/node": "^17.0.31",
         "ts-node": "~10.9.1",
         "tslib": "^2.4.0",
-        "typescript": "~4.7.4",
-        "@types/sha1": "^1.1.3"
+        "typescript": "~4.7.4"
     },
     "dependencies": {
         "@alicloud/pop-core": "^1.7.12",
         "isomorphic-fetch": "^3.0.0",
-        "sha1": "^1.1.1",
         "tencentcloud-sdk-nodejs": "^4.0.525",
         "ts-md5": "^1.3.1"
     }
diff --git a/src/service/wechat/WechatPublic.ts b/src/service/wechat/WechatPublic.ts
index 6f4efff..104e264 100644
--- a/src/service/wechat/WechatPublic.ts
+++ b/src/service/wechat/WechatPublic.ts
@@ -1,7 +1,6 @@
 require('../../fetch');
 import crypto from 'crypto';
 import { Buffer } from 'buffer';
-const sha1 = require('sha1');
 
 // 目前先支持text和news, 其他type文档：https://developers.weixin.qq.com/doc/offiaccount/Message_Management/Service_Center_messages.html
 // type ServeMessageType = 'text' | 'news' | 'mpnews' | 'mpnewsarticle' | 'image' | 'voice' | 'video' | 'music' | 'msgmenu';/
@@ -529,10 +528,13 @@ export class WechatPublicInstance {
                 zhimaString += contentArray[ele as keyof typeof contentArray];
             });
         return {
-            signature: sha1(zhimaString),
+            signature: crypto
+                .createHash('sha1')
+                .update(zhimaString)
+                .digest('hex'),
             noncestr,
             timestamp,
             appId: this.appId,
         };
     }
-}
+}
\ No newline at end of file