diff --git a/.gitignore b/.gitignore
index 7bac85d..7333397 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,6 @@ results
 node_modules
 npm-debug.log
 lib
+bun.lockb
+.tshy*
+dist
diff --git a/README.md b/README.md
index ad0446b..7b47975 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ one-time ready event object.
 Create `ready` event object.
 
 ```ts
-import Ready from 'get-ready';
+import { Ready } from 'get-ready';
 
 const obj = new Ready();
 
@@ -86,7 +86,6 @@ obj.ready(new Error('err'));
 |[<img src="https://avatars.githubusercontent.com/u/221826?v=4" width="100px;"/><br/><sub><b>supershabam</b></sub>](https://github.com/supershabam)<br/>|[<img src="https://avatars.githubusercontent.com/u/156269?v=4" width="100px;"/><br/><sub><b>fengmk2</b></sub>](https://github.com/fengmk2)<br/>|[<img src="https://avatars.githubusercontent.com/u/360661?v=4" width="100px;"/><br/><sub><b>popomore</b></sub>](https://github.com/popomore)<br/>|[<img src="https://avatars.githubusercontent.com/u/985607?v=4" width="100px;"/><br/><sub><b>dead-horse</b></sub>](https://github.com/dead-horse)<br/>|[<img src="https://avatars.githubusercontent.com/u/32174276?v=4" width="100px;"/><br/><sub><b>semantic-release-bot</b></sub>](https://github.com/semantic-release-bot)<br/>|
 | :---: | :---: | :---: | :---: | :---: |
 
-
 This project follows the git-contributor [spec](https://github.com/xudafeng/git-contributor), auto updated at `Mon Jun 05 2023 14:06:50 GMT+0800`.
 
 <!-- GITCONTRIBUTOR_END -->
diff --git a/package.json b/package.json
index 72cd0e1..d812704 100644
--- a/package.json
+++ b/package.json
@@ -2,33 +2,33 @@
   "name": "get-ready",
   "version": "3.0.0",
   "description": "mixin to add one-time ready event callback handler",
-  "main": "lib/index.js",
-  "types": "lib/index.d.ts",
   "files": [
-    "lib"
+    "src",
+    "dist"
   ],
   "dependencies": {},
   "devDependencies": {
     "@eggjs/tsconfig": "^1.3.3",
-    "@types/mocha": "^10.0.1",
-    "@types/node": "^20.2.5",
+    "@types/mocha": "^10.0.2",
+    "@types/node": "^20.8.4",
     "egg-bin": "^6.4.1",
-    "eslint": "^8.42.0",
-    "eslint-config-egg": "^12.2.1",
+    "eslint": "^8.51.0",
+    "eslint-config-egg": "^13.0.0",
     "git-contributor": "^2.1.5",
-    "typescript": "^5.1.3"
+    "tshy": "^1.2.2",
+    "tshy-after": "^1.0.0",
+    "typescript": "^5.2.2"
   },
   "engines": {
     "node": ">= 16.13.0"
   },
   "scripts": {
     "contributor": "git-contributor",
-    "lint": "eslint .",
+    "lint": "eslint src test --ext ts",
     "test": "npm run lint && egg-bin test",
-    "ci": "egg-bin cov && npm run tsc",
+    "ci": "egg-bin cov && npm run prepublishOnly && npm pack",
     "clean": "tsc -b --clean",
-    "tsc": "tsc",
-    "prepublishOnly": "npm run tsc"
+    "prepublishOnly": "tshy && tshy-after"
   },
   "repository": {
     "type": "git",
@@ -44,5 +44,26 @@
   "license": "MIT",
   "bugs": {
     "url": "https://github.com/node-modules/get-ready/issues"
-  }
+  },
+  "tshy": {
+    "exports": {
+      "./package.json": "./package.json",
+      ".": "./src/index.ts"
+    }
+  },
+  "exports": {
+    "./package.json": "./package.json",
+    ".": {
+      "import": {
+        "types": "./dist/esm/index.d.ts",
+        "default": "./dist/esm/index.js"
+      },
+      "require": {
+        "types": "./dist/commonjs/index.d.ts",
+        "default": "./dist/commonjs/index.js"
+      }
+    }
+  },
+  "type": "module",
+  "types": "./dist/commonjs/index.d.ts"
 }
diff --git a/src/index.ts b/src/index.ts
index b1c116a..7db2637 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,7 +1,7 @@
 export type CallbackFunction = (err?: Error) => void;
 export type ReadyFunctionArg = boolean | Error | CallbackFunction | undefined;
 
-export default class Ready {
+export class Ready {
   #isReady: boolean;
   #readyCallbacks: CallbackFunction[];
   #readyArg?: Error = undefined;
@@ -79,3 +79,5 @@ export default class Ready {
     obj.ready = (flagOrFunction: any) => ready.ready(flagOrFunction);
   }
 }
+
+export default Ready;
diff --git a/test/index.test.ts b/test/index.test.ts
index 723cca8..234793e 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -1,5 +1,5 @@
 import { strict as assert } from 'node:assert';
-import Ready, { ReadyFunctionArg } from '../src/index';
+import Ready, { ReadyFunctionArg, Ready as ReadyBase } from '../src/index.js';
 
 class SomeClass {
   property: string;
@@ -19,6 +19,19 @@ class SomeClass {
   }
 }
 
+class ReadySubClass extends ReadyBase {
+  property: string;
+
+  constructor() {
+    super();
+    this.property = 'value';
+  }
+
+  method() {
+    return 'method';
+  }
+}
+
 describe('Ready.mixin', () => {
   it('should exports mixin', () => {
     assert(Ready.mixin);
@@ -160,6 +173,29 @@ describe('error', () => {
   });
 });
 
+describe('work on Ready SubClass', () => {
+  it('should have Ready properties', () => {
+    const someClass = new ReadySubClass();
+    assert('ready' in someClass);
+    assert.equal(typeof someClass.ready, 'function');
+  });
+
+  it('should be separate from other instances', async () => {
+    const someClass = new ReadySubClass();
+    const anotherClass = new ReadySubClass();
+    let someCallCount = 0;
+    let anotherCallCount = 0;
+    anotherClass.ready(() => { anotherCallCount++; });
+    someClass.ready(() => { someCallCount++; });
+    someClass.ready(() => { someCallCount++; });
+    someClass.ready(true);
+    anotherClass.ready(true);
+    await nextTick();
+    assert(someCallCount === 2);
+    assert(anotherCallCount === 1);
+  });
+});
+
 function nextTick() {
   return new Promise<void>(resolve => {
     process.nextTick(resolve);
diff --git a/tsconfig.json b/tsconfig.json
index 1e5143c..294cc3b 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -2,15 +2,8 @@
   "extends": "@eggjs/tsconfig",
   "compilerOptions": {
     "target": "ES2022",
-    "module": "Node16",
-    "outDir": "lib",
+    "module": "nodenext",
+    "moduleResolution": "nodenext",
     "useUnknownInCatchVariables": false
-  },
-  "include": [
-    "src"
-  ],
-  "exclude": [
-    "node_modules",
-    "test"
-  ]
+  }
 }