diff --git a/build/configs.js b/build/configs.js
index c3c2311..f496297 100644
--- a/build/configs.js
+++ b/build/configs.js
@@ -1,10 +1,7 @@
-const fs = require('fs')
 const path = require('path')
 const babel = require('rollup-plugin-babel')
-const beautify = require('js-beautify').js_beautify
 const replace = require('rollup-plugin-replace')
-const pkg = require('../package.json')
-const version = process.env.VERSION || pkg.version
+const version = process.env.VERSION || require('../package.json').version
 const banner =
 `/**
 * vue-webview-js-bridge v${version}
@@ -65,20 +62,7 @@ function genConfig (opts) {
 return config
 }
 
-function writeVersion (version) {
- return new Promise(function (resolve, reject) {
- pkg.version = version
- fs.writeFile(path.join(__dirname, '..', 'package.json'), beautify(JSON.stringify(pkg), { indent_size: 2 }), (err) => {
- if (err) {
- reject(err)
- }
- resolve()
- })
- })
-}
-
-function mapValues (obj, fn, version) {
- writeVersion(version)
+function mapValues (obj, fn) {
 const res = {}
 Object.keys(obj).forEach(key => {
 res[key] = fn(obj[key], key)
@@ -86,4 +70,4 @@ function mapValues (obj, fn, version) {
 return res
 }
 
-module.exports = mapValues(configs, genConfig, version)
+module.exports = mapValues(configs, genConfig)
diff --git a/package.json b/package.json
index e8292f8..05d4baa 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,6 @@
 "eslint-plugin-vue-libs": "^3.0.0",
 "express": "^4.16.4",
 "ghooks": "^2.0.4",
- "js-beautify": "^1.8.9",
 "rollup": "^0.65.0",
 "rollup-plugin-babel": "^3.0.7",
 "rollup-plugin-replace": "^2.0.0",
</div><div class="naked_ctrl">
<form action="/index.cgi/larger-text" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://patch-diff.githubusercontent.com/raw/Kntt/vue-js-bridge/pull/3.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://patch-diff.githubusercontent.com/raw/Kntt/vue-js-bridge/pull/3.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast">配色反転</option>
<option value="larger-text" selected="selected">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>