diff --git a/.travis.yml b/.travis.yml
index bdf6f64..6b4e30d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,8 +4,11 @@ node_js:
   - '6'
   - '8'
   - '10'
+  - '12'
+before_install:
+  - npm i npminstall -g
 install:
-  - npm i npminstall && npminstall
+  - npminstall
 script:
   - npm run ci
 after_script:
diff --git a/appveyor.yml b/appveyor.yml
index 3dc637e..39749ee 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -3,6 +3,7 @@ environment:
     - nodejs_version: '6'
     - nodejs_version: '8'
     - nodejs_version: '10'
+    - nodejs_version: '12'
 
 install:
   - ps: Install-Product node $env:nodejs_version
diff --git a/index.d.ts b/index.d.ts
index 2872307..9250533 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -49,7 +49,7 @@ declare class CommonBin {
    */
   protected context: CommonBin.Context;
 
-  constructor(rawArgv: string[]);
+  constructor(rawArgv?: string[]);
 
   /**
    * command handler, could be generator / async function / normal function which return promise
diff --git a/lib/command.js b/lib/command.js
index 57f607b..59a442c 100644
--- a/lib/command.js
+++ b/lib/command.js
@@ -103,6 +103,10 @@ class CommonBin {
       assert(fs.existsSync(target) && fs.statSync(target).isFile(), `${target} is not a file.`);
       debug('[%s] add command `%s` from `%s`', this.constructor.name, name, target);
       target = require(target);
+      // try to require es module
+      if (target && target.__esModule && target.default) {
+        target = target.default;
+      }
       assert(target.prototype instanceof CommonBin,
         'command class should be sub class of common-bin');
     }
diff --git a/package.json b/package.json
index eb5b8cf..3589513 100644
--- a/package.json
+++ b/package.json
@@ -54,7 +54,7 @@
   ],
   "types": "index.d.ts",
   "ci": {
-    "version": "6, 8, 10",
+    "version": "6, 8, 10, 12",
     "license": {
       "year": "2017",
       "fullname": "node-modules and other contributors"
diff --git a/test/es-module-bin.test.js b/test/es-module-bin.test.js
new file mode 100644
index 0000000..d7399f8
--- /dev/null
+++ b/test/es-module-bin.test.js
@@ -0,0 +1,30 @@
+'use strict';
+
+const path = require('path');
+const coffee = require('coffee');
+const mm = require('mm');
+
+describe('test/es-module-bin.test.js', () => {
+  afterEach(mm.restore);
+
+  const myBin = require.resolve('./fixtures/es-module-bin/bin/es-module-bin.js');
+  const cwd = path.join(__dirname, 'fixtures/test-files');
+
+  it('es-module-bin --help', () => {
+    return coffee.fork(myBin, [ '--help' ], { cwd })
+      .debug()
+      .expect('stdout', /Options:/)
+      .expect('stdout', /-h, --help.*/)
+      .expect('code', 0)
+      .end();
+  });
+
+  it('es-module-bin start', done => {
+    coffee.fork(myBin, [ 'start' ], { cwd })
+      .debug()
+      // .coverage(false)
+      .expect('stdout', /override start command/)
+      .expect('code', 0)
+      .end(done);
+  });
+});
diff --git a/test/fixtures/es-module-bin/bin/es-module-bin.js b/test/fixtures/es-module-bin/bin/es-module-bin.js
new file mode 100755
index 0000000..30f4461
--- /dev/null
+++ b/test/fixtures/es-module-bin/bin/es-module-bin.js
@@ -0,0 +1,7 @@
+#!/usr/bin/env node
+
+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+const __1 = require('..');
+new __1.default().start();
diff --git a/test/fixtures/es-module-bin/command/start.js b/test/fixtures/es-module-bin/command/start.js
new file mode 100644
index 0000000..592ed96
--- /dev/null
+++ b/test/fixtures/es-module-bin/command/start.js
@@ -0,0 +1,17 @@
+'use strict';
+Object.defineProperty(exports, '__esModule', { value: true });
+
+const Command = require('../../../..');
+
+class StartCommand extends Command {
+
+  * run() {
+    console.log('override start command');
+  }
+
+  get description() {
+    return 'start app override';
+  }
+}
+
+exports.default = StartCommand;
diff --git a/test/fixtures/es-module-bin/index.js b/test/fixtures/es-module-bin/index.js
new file mode 100644
index 0000000..11e1ddb
--- /dev/null
+++ b/test/fixtures/es-module-bin/index.js
@@ -0,0 +1,17 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+const Command = require('../../..');
+const path = require('path');
+
+class MainCommand extends Command {
+  constructor(rawArgv) {
+    super(rawArgv);
+    this.yargs.usage('Usage: es-module <command> [options]');
+    // load directory
+    this.load(path.join(__dirname, 'command'));
+  }
+}
+
+exports.default = MainCommand;
diff --git a/test/fixtures/es-module-bin/package.json b/test/fixtures/es-module-bin/package.json
new file mode 100644
index 0000000..cad7940
--- /dev/null
+++ b/test/fixtures/es-module-bin/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "es-module-bin",
+  "version": "3.0.0",
+  "bin": {
+    "es-module-bin": "bin/es-module-bin.js"
+  }
+}