diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2bde606..0997a3a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # 变更历史
 
+## v0.8.9 (2024-02-12)
+
+- 取消对`axios/lib/utils`的依赖。
+
 ## v0.8.8 (2024-01-28)
 
 - 升级依赖 `axios@0.21.2-0.27`, `xml2js@0.5-0.6`;
diff --git a/lib/decorator.js b/lib/decorator.js
index 670dcca..73ff7da 100644
--- a/lib/decorator.js
+++ b/lib/decorator.js
@@ -96,8 +96,8 @@ class Decorator {
         Accept: 'text/xml, text/plain, application/x-gzip',
       },
       responseType: 'text',
-      transformRequest: Transformer.request,
-      transformResponse: Transformer.response,
+      transformRequest: [].concat(Transformer.request),
+      transformResponse: [].concat(Transformer.response),
     }));
   }
 
@@ -211,7 +211,7 @@ class Decorator {
 
     const instance = axios.create(this.withDefaults({
       ...config,
-      transformResponse: [this.responseVerifier(certs), ...axios.defaults.transformResponse],
+      transformResponse: [].concat(this.responseVerifier(certs), axios.defaults.transformResponse),
     }));
 
     instance.interceptors.request.use(this.requestInterceptor());
diff --git a/lib/utils.js b/lib/utils.js
index 2d0cee5..c5747ad 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -1,22 +1,107 @@
 const { AssertionError } = require('assert');
 const { format } = require('util');
 
-// Discussion on axios/axios#3032, the `utils` is not a public API of axios.
-// Using directly may not works in that future release.
-const utils = require('axios/lib/utils');
 const { version: axiosVersion } = require('axios/package.json');
 const { name: pkgName, version: pkgVersion } = require('../package.json');
 
-// Self extends ...
-utils.extend(utils, {
+const { isArray } = Array;
+
+const { isBuffer } = Buffer;
+
+const { toString } = {};
+
+function isString(val) {
+  return typeof val === 'string';
+}
+
+function isObject(val) {
+  return val !== null && typeof val === 'object';
+}
+
+function isNumber(val) {
+  return typeof val === 'number';
+}
+
+function isFunction(val) {
+  return toString.call(val) === '[object Function]';
+}
+
+function isStream(val) {
+  return isObject(val) && isFunction(val.pipe);
+}
+
+function isPlainObject(val) {
+  if (!isObject(val)) {
+    return false;
+  }
+
+  const prototype = Object.getPrototypeOf(val);
+  return prototype === null || prototype === Object.prototype;
+}
+
+function forEach(obj, fn) {
+  if (obj === null || typeof obj === 'undefined') {
+    return;
+  }
+
+  if (typeof obj !== 'object') {
+    /* eslint no-param-reassign:0 */
+    obj = [obj];
+  }
+
+  if (isArray(obj)) {
+    for (let i = 0, l = obj.length; i < l; i += 1) {
+      fn.call(null, obj[i], i, obj);
+    }
+  } else {
+    Object.keys(obj).forEach((key) => fn.call(null, obj[key], key, obj));
+  }
+}
+
+function merge(...args) {
+  const result = {};
+  function assignValue(val, key) {
+    if (isPlainObject(result[key]) && isPlainObject(val)) {
+      result[key] = merge(result[key], val);
+    } else if (isPlainObject(val)) {
+      result[key] = merge({}, val);
+    } else if (isArray(val)) {
+      result[key] = val.slice();
+    } else {
+      result[key] = val;
+    }
+  }
+
+  for (let i = 0, l = args.length; i < l; i += 1) {
+    forEach(args[i], assignValue);
+  }
+  return result;
+}
+
+function isProcessEnv() {
+  return typeof process !== 'undefined' && toString.call(process) === '[object process]';
+}
+
+function isProcessFormData(val) {
+  return isProcessEnv() && isObject(val) && toString.call(val) === '[object FormData]';
+}
+
+module.exports = {
+  isString,
+  isNumber,
+  isArray,
+  isObject,
+  isFunction,
+  isStream,
+  isBuffer,
+  merge,
+
   /**
    * Similar to `isStandardBrowserEnv`, just check it's running in a Node environment
    *
    * @return {boolean} Ture on Node, otherwise false
    */
-  isProcessEnv() {
-    return typeof process !== 'undefined' && toString.call(process) === '[object process]';
-  },
+  isProcessEnv,
 
   /**
    * Determine if a value is a `form-data` node module
@@ -28,10 +113,7 @@ utils.extend(utils, {
    *
    * @returns {boolean} True if value is a `form-data` module, otherwise false
    */
-  isProcessFormData(val) {
-    // @see {@link https://github.com/TheNorthMemory/wechatpay-axios-plugin/issues/22}
-    return this.isProcessEnv() && this.isObject(val) && toString.call(val) === '[object FormData]';
-  },
+  isProcessFormData,
 
   /**
    * Compose the `User-Agent` content
@@ -63,6 +145,4 @@ utils.extend(utils, {
 
     return error;
   },
-});
-
-module.exports = utils;
+};
diff --git a/package.json b/package.json
index 588952b..c3edd0e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "wechatpay-axios-plugin",
-  "version": "0.8.8",
+  "version": "0.8.9",
   "description": "微信支付APIv2及v3 NodeJS SDK，支持CLI模式请求OpenAPI，支持v3证书下载，v2付款码支付、企业付款、退款，企业微信-企业支付-企业红包/向员工付款，v2&v3 Native支付、扫码支付、H5支付、JSAPI/小程序支付、合单支付...",
   "main": "index.js",
   "typings": "index.d.ts",
diff --git a/tests/lib/utils.test.js b/tests/lib/utils.test.js
index 5333932..54cadbc 100644
--- a/tests/lib/utils.test.js
+++ b/tests/lib/utils.test.js
@@ -38,11 +38,6 @@ describe('lib/utils', () => {
     should(utils.merge).be.a.Function();
   });
 
-  it('should have `extend` property and be a function', () => {
-    utils.should.have.property('extend');
-    should(utils.extend).be.a.Function();
-  });
-
   describe('utils::isProcessEnv', () => {
     it('method `isProcessEnv` should be function', () => {
       should(utils.isProcessEnv).be.a.Function();