diff --git a/lib/abort-controller.js b/lib/abort-controller.js
index 5fa7cdb..0bf84c7 100644
--- a/lib/abort-controller.js
+++ b/lib/abort-controller.js
@@ -2,6 +2,8 @@
  * @module AbortController
  */
 
+const {globalObject}= require('./utils');
+
 const _signal = Symbol('signal');
 const _aborted = Symbol('aborted');
 const _events = Symbol('events');
@@ -10,6 +12,7 @@ const _repeatedly = Symbol('repeatedly');
 
 const nativeAbortController= (()=>{
     try {
+        const {AbortController}= globalObject;
         if (typeof AbortController === 'function') {
             const controller = new AbortController();
             if (controller.toString() === '[object AbortController]' &&
diff --git a/lib/env.js b/lib/env.js
index f573b05..6ed8bfd 100644
--- a/lib/env.js
+++ b/lib/env.js
@@ -1,4 +1,4 @@
-const {version} = require('../package.json');
+const {version} = require('./env.json');
 
 const _version= Symbol.for('CPromise:version');
 const _versionNumber= Symbol.for('CPromise:version:number');
diff --git a/lib/env.json b/lib/env.json
new file mode 100644
index 0000000..5c51ed3
--- /dev/null
+++ b/lib/env.json
@@ -0,0 +1 @@
+{"version":"0.13.2"}
\ No newline at end of file
diff --git a/rollup.config.js b/rollup.config.js
index 6eb67e9..892181d 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -1,3 +1,4 @@
+import fs from 'fs';
 import resolve from '@rollup/plugin-node-resolve';
 import commonjs from '@rollup/plugin-commonjs';
 import { terser } from "rollup-plugin-terser";
@@ -11,6 +12,8 @@ const input = './lib/c-promise.js';
 const year= new Date().getFullYear();
 const banner= `// ${lib.name} v${lib.version}\n// Copyright (c) ${year===2020? "2020" : "2020-"+ year} ${lib.author.name} <${lib.author.email}>`;
 
+fs.writeFileSync('./lib/env.json', JSON.stringify({version: lib.version}))
+
 export default [
         {
             input,