diff --git a/bin/cloudcmd.js b/bin/cloudcmd.mjs
similarity index 82%
rename from bin/cloudcmd.js
rename to bin/cloudcmd.mjs
index 201331af..85e43a08 100755
--- a/bin/cloudcmd.js
+++ b/bin/cloudcmd.mjs
@@ -1,25 +1,21 @@
 #!/usr/bin/env node
 
-'use strict';
-
-const Info = require('../package');
 const DIR_SERVER = '../server/';
 
-const {promisify} = require('util');
-const tryToCatch = require('try-to-catch');
+import {createRequire} from 'module';
+import {promisify} from 'util';
+import tryToCatch from 'try-to-catch';
+import {createSimport} from 'simport';
 
-const exit = require(DIR_SERVER + 'exit');
-const {
-    createConfig,
-    configPath,
-} = require(DIR_SERVER + 'config');
+import exit from '../server/exit.js';
+import {createConfig, configPath} from '../server/config.js';
 
 const config = createConfig({
     configPath,
 });
 
-const env = require(DIR_SERVER + 'env');
-const prefixer = require(DIR_SERVER + '/prefixer');
+import env from '../server/env.js';
+import prefixer from '../server/prefixer.js';
 
 const choose = (a, b) => {
     if (a === undefined)
@@ -30,6 +26,11 @@ const choose = (a, b) => {
 
 process.on('unhandledRejection', exit);
 
+const simport = createSimport(import.meta.url);
+const require = createRequire(import.meta.url);
+
+const Info = require('../package.json');
+
 const {argv} = process;
 const args = require('minimist')(argv.slice(2), {
     string: [
@@ -186,7 +187,7 @@ async function main() {
     config('dropbox', args['dropbox']);
     config('dropboxToken', args['dropbox-token'] || '');
     
-    readConfig(args.config);
+    await readConfig(args.config);
     
     const options = {
         root: config('root'),
@@ -200,17 +201,17 @@ async function main() {
     const password = env('password') || args.password;
     
     if (password)
-        config('password', getPassword(password));
+        config('password', await getPassword(password));
     
-    validateRoot(options.root, config);
+    await validateRoot(options.root, config);
     
     if (args['show-config'])
-        showConfig();
+        await showConfig();
     
-    const distribute = require('../server/distribute');
+    const distribute = await simport('../server/distribute/index.js');
     const importConfig = promisify(distribute.import);
     
-    start(options, config);
+    await start(options, config);
     
     if (args.save)
         config.write();
@@ -219,8 +220,8 @@ async function main() {
     await importConfig(config);
 }
 
-function validateRoot(root, config) {
-    const validate = require(DIR_SERVER + 'validate');
+async function validateRoot(root, config) {
+    const validate = await simport(DIR_SERVER + 'validate.js');
     validate.root(root, config);
     
     if (root === '/')
@@ -229,8 +230,8 @@ function validateRoot(root, config) {
     console.log(`root: ${root}`);
 }
 
-function getPassword(password) {
-    const criton = require('criton');
+async function getPassword(password) {
+    const criton = await import('criton');
     return criton(password, config('algo'));
 }
 
@@ -238,13 +239,13 @@ function version() {
     console.log('v' + Info.version);
 }
 
-function start(options, config) {
-    const SERVER = DIR_SERVER + 'server';
+async function start(options, config) {
+    const SERVER = DIR_SERVER + 'server.js';
     
     if (!args.server)
         return;
     
-    const server = require(SERVER);
+    const server = await simport(SERVER);
     server(options, config);
 }
 
@@ -257,27 +258,21 @@ function port(arg) {
     exit('cloudcmd --port: should be a number');
 }
 
-function showConfig() {
-    const show = require('../server/show-config');
+async function showConfig() {
+    const show = await simport('../server/show-config');
     const data = show(config('*'));
     
     console.log(data);
 }
 
-function readConfig(name) {
+async function readConfig(name) {
     if (!name)
         return;
     
-    const fs = require('fs');
-    const tryCatch = require('try-catch');
-    const jju = require('jju');
-    const forEachKey = require('for-each-key');
+    const tryToCatch = await simport('try-to-catch');
+    const forEachKey = await import('for-each-key');
     
-    const readjsonSync = (name) => jju.parse(fs.readFileSync(name, 'utf8'), {
-        mode: 'json',
-    });
-    
-    const [error, data] = tryCatch(readjsonSync, name);
+    const [error, data] = await tryToCatch(simport, name);
     
     if (error)
         return exit(error.message);
@@ -285,10 +280,11 @@ function readConfig(name) {
     forEachKey(config, data);
 }
 
-function help() {
-    const bin = require('../json/help');
-    const forEachKey = require('for-each-key');
-    const currify = require('currify');
+async function help() {
+    const bin = require('../json/help.json');
+    const forEachKey = await simport('for-each-key');
+    const currify = await simport('currify');
+    
     const usage = 'Usage: cloudcmd [options]';
     const url = Info.homepage;
     const log = currify((a, b, c) => console.log(a, b, c));
@@ -305,17 +301,17 @@ function repl() {
 }
 
 async function checkUpdate() {
-    const load = require('package-json');
+    const load = await simport('package-json');
     
     const {version} = await load(Info.name, 'latest');
-    showUpdateInfo(version);
+    await showUpdateInfo(version);
 }
 
-function showUpdateInfo(version) {
+async function showUpdateInfo(version) {
     if (version === Info.version)
         return;
     
-    const chalk = require('chalk');
+    const chalk = await simport('chalk');
     
     const latestVersion = chalk.green.bold('v' + version);
     const latest = `update available: ${latestVersion}`;
diff --git a/bin/release.js b/bin/release.mjs
similarity index 89%
rename from bin/release.js
rename to bin/release.mjs
index f3e6bf93..b2870780 100755
--- a/bin/release.js
+++ b/bin/release.mjs
@@ -1,14 +1,11 @@
 #!/usr/bin/env node
 
-'use strict';
+import Info from '../package.js';
 
-const DIR = '../';
-const Info = require(DIR + 'package');
-
-const minor = require('minor');
-const place = require('place');
-const rendy = require('rendy');
-const shortdate = require('shortdate');
+import minor from 'minor';
+import place from 'place';
+import rendy from 'rendy';
+import shortdate from 'shortdate';
 
 const ERROR = Error('ERROR: version is missing. release --patch|--minor|--major');
 
diff --git a/package.json b/package.json
index a73d66ca..08e47b9e 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "server"
   ],
   "bin": {
-    "cloudcmd": "bin/cloudcmd.js"
+    "cloudcmd": "bin/cloudcmd.mjs"
   },
   "nyc": {
     "exclude": [
@@ -152,6 +152,7 @@
     "restafary": "^8.0.0",
     "restbox": "^2.0.0",
     "shortdate": "^2.0.0",
+    "simport": "^1.0.1",
     "socket.io": "^3.0.1",
     "socket.io-client": "^3.0.1",
     "squad": "^3.0.0",