diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
new file mode 100644
index 0000000..09804eb
--- /dev/null
+++ b/.github/workflows/nodejs.yml
@@ -0,0 +1,18 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+
+  pull_request:
+    branches: [ master ]
+
+  workflow_dispatch: {}
+
+jobs:
+  Job:
+    name: Node.js
+    uses: artusjs/github-actions/.github/workflows/node-test.yml@v1
+    with:
+      os: 'ubuntu-latest'
+      version: '8, 10, 12, 14, 16, 18, 20'
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..1612587
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,17 @@
+name: Release
+
+on:
+  push:
+    branches: [ master ]
+
+  workflow_dispatch: {}
+
+jobs:
+  release:
+    name: Node.js
+    uses: artusjs/github-actions/.github/workflows/node-release.yml@v1
+    secrets:
+      NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+      GIT_TOKEN: ${{ secrets.GIT_TOKEN }}
+    with:
+      checkTest: false
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index c687fc7..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-os:
-  - linux
-  - osx
-  - windows
-language: node_js
-node_js:
-  - '8'
-  - '10'
-  - '12'
-  - '14'
-install:
-  - npm install --global npminstall && npminstall
-script:
-  - 'npm run ci'
-after_script:
-  - 'npm i codecov && codecov'
-  - 'node benchmark/map.js'
-  - 'node benchmark/array_splice.js'
diff --git a/lib/array.js b/array.js
similarity index 100%
rename from lib/array.js
rename to array.js
diff --git a/lib/crypto.js b/crypto.js
similarity index 100%
rename from lib/crypto.js
rename to crypto.js
diff --git a/lib/date.js b/date.js
similarity index 100%
rename from lib/date.js
rename to date.js
diff --git a/lib/function.js b/function.js
similarity index 100%
rename from lib/function.js
rename to function.js
diff --git a/lib/json.js b/json.js
similarity index 70%
rename from lib/json.js
rename to json.js
index 684dee9..468e55f 100644
--- a/lib/json.js
+++ b/json.js
@@ -1,8 +1,21 @@
 'use strict';
 
-var fs = require('mz/fs');
 var path = require('path');
-var mkdirp = require('mkdirp');
+
+var _mkdirp;
+function getMkdirp() {
+  if (!_mkdirp) {
+    _mkdirp = require('mkdirp');
+  }
+  return _mkdirp;
+}
+var _fs;
+function getFS() {
+  if (!_fs) {
+    _fs = require('mz/fs');
+  }
+  return _fs;
+}
 
 exports.strictJSONParse = function (str) {
   var obj = JSON.parse(str);
@@ -13,10 +26,10 @@ exports.strictJSONParse = function (str) {
 };
 
 exports.readJSONSync = function(filepath) {
-  if (!fs.existsSync(filepath)) {
+  if (!getFS().existsSync(filepath)) {
     throw new Error(filepath + ' is not found');
   }
-  return JSON.parse(fs.readFileSync(filepath));
+  return JSON.parse(getFS().readFileSync(filepath));
 };
 
 exports.writeJSONSync = function(filepath, str, options) {
@@ -25,21 +38,21 @@ exports.writeJSONSync = function(filepath, str, options) {
     options.space = 2;
   }
 
-  mkdirp.sync(path.dirname(filepath));
+  getMkdirp().sync(path.dirname(filepath));
   if (typeof str === 'object') {
     str = JSON.stringify(str, options.replacer, options.space) + '\n';
   }
 
-  fs.writeFileSync(filepath, str);
+  getFS().writeFileSync(filepath, str);
 };
 
 exports.readJSON = function(filepath) {
-  return fs.exists(filepath)
+  return getFS().exists(filepath)
     .then(function(exists) {
       if (!exists) {
         throw new Error(filepath + ' is not found');
       }
-      return fs.readFile(filepath);
+      return getFS().readFile(filepath);
     })
     .then(function(buf) {
       return JSON.parse(buf);
@@ -58,13 +71,13 @@ exports.writeJSON = function(filepath, str, options) {
 
   return mkdir(path.dirname(filepath))
     .then(function() {
-      return fs.writeFile(filepath, str);
+      return getFS().writeFile(filepath, str);
     });
 };
 
 function mkdir(dir) {
   return new Promise(function(resolve, reject) {
-    mkdirp(dir, function(err) {
+    getMkdirp()(dir, function(err) {
       if (err) {
         return reject(err);
       }
diff --git a/lib/number.js b/number.js
similarity index 100%
rename from lib/number.js
rename to number.js
diff --git a/lib/object.js b/object.js
similarity index 100%
rename from lib/object.js
rename to object.js
diff --git a/lib/optimize.js b/optimize.js
similarity index 100%
rename from lib/optimize.js
rename to optimize.js
diff --git a/package.json b/package.json
index d4961b6..634647d 100644
--- a/package.json
+++ b/package.json
@@ -2,9 +2,9 @@
   "name": "utility",
   "version": "1.17.0",
   "description": "A collection of useful utilities.",
-  "main": "lib/utility.js",
+  "main": "utility.js",
   "files": [
-    "lib",
+    "*.js",
     "index.d.ts"
   ],
   "scripts": {
@@ -15,7 +15,6 @@
     "test-cov": "nyc ava test/**/*.test.js && nyc report --reporter=lcov",
     "lint": "jshint .",
     "ci": "npm run lint && npm run test-cov && npm run test-ts",
-    "autod": "autod -w --prefix '^' -e benchmark",
     "test-optimized": "node --allow-natives-syntax --trace_opt --trace_deopt test/optimized.js",
     "contributor": "git-contributor"
   },
@@ -29,7 +28,6 @@
   "devDependencies": {
     "@types/escape-html": "0.0.20",
     "@types/node": "^10.12.12",
-    "autod": "*",
     "ava": "^0.25.0",
     "ava-ts": "^0.25.2",
     "beautify-benchmark": "*",
@@ -42,8 +40,9 @@
     "object-assign": "^4.1.1",
     "optimized": "^1.2.0",
     "rimraf": "^2.6.2",
+    "time-require": "^0.1.2",
     "ts-node": "^7.0.1",
-    "typescript": "^3.2.2"
+    "typescript": "^5.0.4"
   },
   "homepage": "https://github.com/node-modules/utility",
   "repository": {
@@ -63,6 +62,6 @@
   "engines": {
     "node": ">= 0.12.0"
   },
-  "author": "fengmk2 <fengmk2@gmail.com> (https://fengmk2.com)",
+  "author": "fengmk2 <fengmk2@gmail.com> (https://github.com/fengmk2)",
   "license": "MIT"
 }
diff --git a/lib/polyfill.js b/polyfill.js
similarity index 100%
rename from lib/polyfill.js
rename to polyfill.js
diff --git a/lib/string.js b/string.js
similarity index 100%
rename from lib/string.js
rename to string.js
diff --git a/test/json.test.js b/test/json.test.js
index 96ebacc..2486a03 100644
--- a/test/json.test.js
+++ b/test/json.test.js
@@ -5,7 +5,7 @@ import path from 'path';
 import rimraf from 'rimraf';
 import assert from 'assert';
 import test from 'ava';
-import utils from '../';
+import utils from '../json';
 
 test('strictJSONParse() should parse normal json ok', t => {
   const obj = utils.strictJSONParse('{"foo": "bar"}');
diff --git a/test_ts/date.test.ts b/test_ts/date.test.ts
index b03c464..83f9fd7 100644
--- a/test_ts/date.test.ts
+++ b/test_ts/date.test.ts
@@ -2,7 +2,6 @@ import test from 'ava';
 import * as moment from 'moment';
 import * as utility from '../';
 
-
 test('YYYYMMDDHHmmss() should return an "YYYY-MM-DD HH:mm:ss" format date string', t => {
 
   // !!! TSError
@@ -136,7 +135,7 @@ test('datestruct() should return an date struct', t => {
 test('timestamp() should return a unix timestamp', t => {
   const ts = utility.timestamp();
   t.is(typeof ts, 'number');
-  t.true(ts > 1378153366);
+  t.true(ts as any > 1378153366);
   t.is(String(ts).length, 10);
 
   t.is((utility.timestamp(1385091596) as Date).getTime(), 1385091596000);
diff --git a/test_ts/function.test.ts b/test_ts/function.test.ts
index 04b7c38..83db31a 100644
--- a/test_ts/function.test.ts
+++ b/test_ts/function.test.ts
@@ -2,10 +2,9 @@
 import test from 'ava';
 import * as utility from '../';
 
-
 test('getParamNames() should return parameter names', t => {
-  t.throws(() => utility.getParamNames(null));
-  t.throws(() => utility.getParamNames(undefined));
+  t.throws(() => utility.getParamNames(null as any));
+  t.throws(() => utility.getParamNames(undefined as any));
   t.deepEqual(utility.getParamNames(function () {}), []);
   /* jshint ignore:start */
   t.deepEqual(utility.getParamNames(function (key1) {}), ['key1']);
diff --git a/test_ts/object.test.ts b/test_ts/object.test.ts
index 5c5fe7e..0fee802 100644
--- a/test_ts/object.test.ts
+++ b/test_ts/object.test.ts
@@ -14,7 +14,7 @@ test('has() should has property ok', t => {
 
 test('getOwnEnumerables() should return all enumerable and ownership property names', t => {
   t.deepEqual(utility.getOwnEnumerables({a: 1}), [ 'a' ]);
-  const a = { a: 1 };
+  const a = { a: 1 } as any;
   Object.defineProperties(a, {
     one: { enumerable: true, value: 'one' },
     two: { enumerable: false, value: function() {} },
diff --git a/test_ts/optimize.test.ts b/test_ts/optimize.test.ts
index b370c38..c8896c2 100644
--- a/test_ts/optimize.test.ts
+++ b/test_ts/optimize.test.ts
@@ -31,7 +31,7 @@ test('try() should work when throw err with string', t => {
     throw 'string error';
   });
   t.true(res.error instanceof Error);
-  t.is(res.error.message, 'string error');
+  t.is(res.error!.message, 'string error');
   t.falsy(res.value);
 });
 
diff --git a/test_ts/string.test.ts b/test_ts/string.test.ts
index 976b3d2..dc7de50 100644
--- a/test_ts/string.test.ts
+++ b/test_ts/string.test.ts
@@ -1,7 +1,6 @@
 import test from 'ava';
 import * as utility from '../';
 
-
 test('randomString() should get random string by default', t => {
   t.regex(utility.randomString(), /^[0-9a-zA-Z]{16}$/);
 });
@@ -25,7 +24,7 @@ test('split(), splitAlwaysOptimized() should return []', t => {
   // !!! TSError
   // t.deepEqual(utility.split(), []);
 
-  t.deepEqual(utility.split(null), []);
+  t.deepEqual(utility.split(null as any), []);
   t.deepEqual(utility.split(''), []);
 
   t.deepEqual(utility.splitAlwaysOptimized(',,,,'), []);
diff --git a/lib/utility.js b/utility.js
similarity index 100%
rename from lib/utility.js
rename to utility.js
diff --git a/lib/web.js b/web.js
similarity index 100%
rename from lib/web.js
rename to web.js