diff --git a/src/web/app/auth/script.js b/src/web/app/auth/script.js
index 9743415b12..9ada80ce68 100644
--- a/src/web/app/auth/script.js
+++ b/src/web/app/auth/script.js
@@ -5,7 +5,7 @@
 const riot = require('riot');
 document.title = 'Misskey | アプリの連携';
 require('./tags.ls');
-const boot = require('../boot.ls');
+const boot = require('../boot.js');
 
 /**
  * Boot
diff --git a/src/web/app/boot.js b/src/web/app/boot.js
new file mode 100644
index 0000000000..e626c35f5c
--- /dev/null
+++ b/src/web/app/boot.js
@@ -0,0 +1,169 @@
+/*
+MISSKEY BOOT LOADER
+
+Misskeyを起動します。
+1. 初期化
+2. ユーザー取得(ログインしていれば)
+3. アプリケーションをマウント
+*/
+
+// LOAD DEPENDENCIES
+
+const riot = require('riot');
+require('velocity');
+const log = require('./common/scripts/log.ls');
+const api = require('./common/scripts/api.ls');
+const signout = require('./common/scripts/signout.ls');
+const generateDefaultUserdata = require('./common/scripts/generate-default-userdata.ls');
+const mixins = require('./common/mixins.ls');
+const checkForUpdate = require('./common/scripts/check-for-update.ls');
+require('./common/tags.ls');
+
+// MISSKEY ENTORY POINT
+
+document.domain = CONFIG.host;
+
+// ↓ iOS待ちPolyfill (SEE: http://caniuse.com/#feat=fetch)
+require('fetch');
+
+// ↓ NodeList、HTMLCollectionで forEach を使えるようにする
+if (NodeList.prototype.forEach === undefined) {
+  NodeList.prototype.forEach = Array.prototype.forEach;
+}
+if (HTMLCollection.prototype.forEach === undefined) {
+  HTMLCollection.prototype.forEach = Array.prototype.forEach;
+}
+
+// ↓ iOSでプライベートモードだとlocalStorageが使えないので既存のメソッドを上書きする
+try {
+  localStorage.setItem('kyoppie', 'yuppie');
+} catch (e) {
+  Storage.prototype.setItem = () => { }; // noop
+}
+
+// MAIN PROCESS
+
+log("Misskey (aoi) v:" + VERSION);
+
+// Check for Update
+checkForUpdate();
+
+// Get token from cookie
+const i = (document.cookie.match(/i=(\w+)/) || [null, null])[1];
+
+if (i != null) {
+  log("ME: " + i);
+}
+
+// ユーザーをフェッチしてコールバックする
+module.exports = callback => {
+	// Get cached account data
+  let cachedMe = JSON.parse(localStorage.getItem('me'));
+
+  if (cachedMe != null && cachedMe.data != null && cachedMe.data.cache) {
+    fetched(cachedMe);
+
+		// 後から新鮮なデータをフェッチ
+    fetchme(i, true, freshData => {
+      Object.assign(cachedMe, freshData);
+      cachedMe.trigger('updated');
+    });
+  } else {
+		// キャッシュ無効なのにキャッシュが残ってたら掃除
+    if (cachedMe != null) {
+      localStorage.removeItem('me');
+    }
+    fetchme(i, false, fetched);
+  }
+
+  function fetched(me) {
+    if (me != null) {
+      riot.observable(me);
+      if (me.data.cache) {
+        localStorage.setItem('me', JSON.stringify(me));
+        me.on('updated', () => {
+					// キャッシュ更新
+          localStorage.setItem('me', JSON.stringify(me));
+        });
+      }
+      log("Fetched! Hello " + me.username + ".");
+    }
+    mixins(me);
+    const init = document.getElementById('init');
+    init.parentNode.removeChild(init);
+    const app = document.createElement('div');
+    app.setAttribute('id', 'app');
+    document.body.appendChild(app);
+    try {
+      callback(me);
+    } catch (e) {
+      panic(e);
+    }
+  }
+};
+
+// ユーザーをフェッチしてコールバックする
+function fetchme(token, silent, cb) {
+  let me = null;
+
+	// Return when not signed in
+  if (token == null) {
+    done();
+  }
+
+	// Fetch user
+  fetch(CONFIG.api.url + "/i", {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/x-www-form-urlencoded; charset=utf-8'
+    },
+    body: "i=" + token
+  }).then(res => {
+		// When failed to authenticate user
+    if (res.status !== 200) {
+      signout();
+    }
+    res.json().then(i => {
+      me = i;
+      me.token = token;
+
+			// initialize it if user data is empty
+      if (me.data != null) {
+        done();
+      } else {
+        init();
+      }
+    });
+  }).catch(() => {
+    if (!silent) {
+      const info = document.body.appendChild(document.createElement('mk-core-error'));
+      riot.mount(info, {
+        retry: () => {
+          fetchme(token, false, cb);
+        }
+      });
+		}
+  });
+
+  function done() {
+    if (cb != null) {
+    	cb(me);
+    }
+  }
+
+  function init() {
+    var data, this$ = this;
+    data = generateDefaultUserdata();
+    api(token, 'i/appdata/set', {
+      data: JSON.stringify(data)
+    }).then(() => {
+      me.data = data;
+      done();
+    });
+  }
+}
+
+function panic(e) {
+  console.error(e);
+  document.body.innerHTML = '<div id="error"><p>致命的な問題が発生しました。</p></div>';
+}
diff --git a/src/web/app/boot.ls b/src/web/app/boot.ls
deleted file mode 100644
index d1230f8f0b..0000000000
--- a/src/web/app/boot.ls
+++ /dev/null
@@ -1,154 +0,0 @@
-#================================
-# MISSKEY BOOT LOADER
-#
-# Misskeyを起動します。
-# 1. 初期化
-# 2. ユーザー取得(ログインしていれば)
-# 3. アプリケーションをマウント
-#================================
-
-# LOAD DEPENDENCIES
-#--------------------------------
-
-riot = require \riot
-require \velocity
-log = require './common/scripts/log.ls'
-api = require './common/scripts/api.ls'
-signout = require './common/scripts/signout.ls'
-generate-default-userdata = require './common/scripts/generate-default-userdata.ls'
-mixins = require './common/mixins.ls'
-check-for-update = require './common/scripts/check-for-update.ls'
-require './common/tags.ls'
-
-# MISSKEY ENTORY POINT
-#--------------------------------
-
-# for subdomains
-document.domain = CONFIG.host
-
-# ↓ iOS待ちPolyfill (SEE: http://caniuse.com/#feat=fetch)
-require \fetch
-
-# ↓ NodeList、HTMLCollectionで forEach を使えるようにする
-if NodeList.prototype.for-each == undefined
-	NodeList.prototype.for-each = Array.prototype.for-each
-if HTMLCollection.prototype.for-each == undefined
-	HTMLCollection.prototype.for-each = Array.prototype.for-each
-
-# ↓ iOSでプライベートモードだとlocalStorageが使えないので既存のメソッドを上書きする
-try
-	local-storage.set-item \kyoppie \yuppie
-catch e
-	Storage.prototype.set-item = ~> # noop
-
-# MAIN PROCESS
-#--------------------------------
-
-log "Misskey (aoi) v:#{VERSION}"
-
-# Check for Update
-check-for-update!
-
-# Get token from cookie
-i = ((document.cookie.match /i=(\w+)/) || [null null]).1
-
-if i? then log "ME: #{i}"
-
-# ユーザーをフェッチしてコールバックする
-module.exports = (callback) ~>
-	# Get cached account data
-	cached-me = JSON.parse local-storage.get-item \me
-
-	if cached-me?.data?.cache
-		fetched cached-me
-
-		# 後から新鮮なデータをフェッチ
-		fetchme i, true, (fresh-data) ~>
-			Object.assign cached-me, fresh-data
-			cached-me.trigger \updated
-	else
-		# キャッシュ無効なのにキャッシュが残ってたら掃除
-		if cached-me?
-			local-storage.remove-item \me
-
-		fetchme i, false, fetched
-
-	function fetched me
-
-		if me?
-			riot.observable me
-
-			if me.data.cache
-				local-storage.set-item \me JSON.stringify me
-
-				me.on \updated ~>
-					# キャッシュ更新
-					local-storage.set-item \me JSON.stringify me
-
-			log "Fetched! Hello #{me.username}."
-
-		# activate mixins
-		mixins me
-
-		# destroy loading screen
-		init = document.get-element-by-id \init
-		init.parent-node.remove-child init
-
-		# set main element
-		document.create-element \div
-			..set-attribute \id \app
-			.. |> document.body.append-child
-
-		# Call main proccess
-		try
-			callback me
-		catch error
-			panic error
-
-# ユーザーをフェッチしてコールバックする
-function fetchme token, silent, cb
-	me = null
-
-	# Return when not signed in
-	if not token? then return done!
-
-	# Fetch user
-	fetch "#{CONFIG.api.url}/i" do
-		method: \POST
-		headers:
-			'Content-Type': 'application/x-www-form-urlencoded; charset=utf-8'
-		body: "i=#token"
-	.then (res) ~>
-		# When failed to authenticate user
-		if res.status != 200 then signout!
-
-		i <~ res.json!.then
-		me := i
-		me.token = token
-
-		# initialize it if user data is empty
-		if me.data? then done! else init!
-	.catch ~>
-		if not silent
-			info = document.create-element \mk-core-error
-				|> document.body.append-child
-			riot.mount info, do
-				retry: ~> fetchme token, false, cb
-		else
-			# noop
-
-	function done
-		if cb? then cb me
-
-	function init
-		data = generate-default-userdata!
-
-		api token, \i/appdata/set do
-			data: JSON.stringify data
-		.then ~>
-			me.data = data
-			done!
-
-function panic e
-	console.error e
-	document.body.innerHTML = '<div id="error"><p>致命的な問題が発生しました。</p></div>'
diff --git a/src/web/app/desktop/script.js b/src/web/app/desktop/script.js
index 473797334f..179cfa332a 100644
--- a/src/web/app/desktop/script.js
+++ b/src/web/app/desktop/script.js
@@ -5,7 +5,7 @@
 require('chart.js');
 require('./tags.ls');
 const riot = require('riot');
-const boot = require('../boot.ls');
+const boot = require('../boot.js');
 const mixins = require('./mixins.ls');
 const route = require('./router.ls');
 const fuckAdBlock = require('./scripts/fuck-ad-block.ls');
diff --git a/src/web/app/dev/script.js b/src/web/app/dev/script.js
index 407f4e84c0..575f545b2c 100644
--- a/src/web/app/dev/script.js
+++ b/src/web/app/dev/script.js
@@ -3,7 +3,7 @@
  */
 
 require('./tags.ls');
-const boot = require('../boot.ls');
+const boot = require('../boot.js');
 const route = require('./router.ls');
 
 /**
diff --git a/src/web/app/mobile/script.js b/src/web/app/mobile/script.js
index 1c269a57d9..0da0a985c8 100644
--- a/src/web/app/mobile/script.js
+++ b/src/web/app/mobile/script.js
@@ -4,7 +4,7 @@
 
 require('./tags.ls');
 require('./scripts/sp-slidemenu.js');
-const boot = require('../boot.ls');
+const boot = require('../boot.js');
 const mixins = require('./mixins.ls');
 const route = require('./router.ls');