diff --git a/docs/license.pug b/docs/license.pug
index 229a47385a..323b9b9528 100644
--- a/docs/license.pug
+++ b/docs/license.pug
@@ -5,11 +5,4 @@ block title
 
 block content
 	h1 ライセンス
-
 	div!= license
-
-	hr
-
-	details
-		summary サードパーティ
-		div!= thirdpartyLicenses
diff --git a/gulpfile.ts b/gulpfile.ts
index 00772925ef..f7503912ce 100644
--- a/gulpfile.ts
+++ b/gulpfile.ts
@@ -14,16 +14,13 @@ import * as es from 'event-stream';
 import * as webpack from 'webpack-stream';
 import cssnano = require('gulp-cssnano');
 import * as uglify from 'gulp-uglify';
-import riotify = require('riotify');
 import pug = require('gulp-pug');
 import git = require('git-last-commit');
 import * as rimraf from 'rimraf';
-import * as escapeHtml from 'escape-html';
 import prominence = require('prominence');
 import * as chalk from 'chalk';
 import imagemin = require('gulp-imagemin');
 import * as rename from 'gulp-rename';
-import named = require('vinyl-named');
 
 const env = process.env.NODE_ENV;
 const isProduction = env === 'production';
@@ -33,6 +30,8 @@ if (isDebug) {
 	console.log(chalk.yellow.bold('！！！注意！！！　開発モードが有効です。(成果物の圧縮などはスキップされます)'));
 }
 
+const constants = require('./src/const.json');
+
 const tsProject = ts.createProject('tsconfig.json');
 
 gulp.task('build', [
@@ -65,37 +64,22 @@ gulp.task('build:ts', () =>
 
 gulp.task('build:about:docs', () => {
 	function getLicenseHtml(path: string) {
-		return escapeHtml(fs.readFileSync(path, 'utf-8'))
+		return fs.readFileSync(path, 'utf-8')
 			.replace(/\r\n/g, '\n')
 			.replace(/(.)\n(.)/g, '$1 $2')
 			.replace(/(^|\n)(.*?)($|\n)/g, '<p>$2</p>');
 	}
 
-	function getLicenseSectionHtml(path: string) {
-		try {
-			const pkg = JSON.parse(fs.readFileSync(Path.parse(path).dir + '/package.json', 'utf-8'));
-			const licenseHtml = getLicenseHtml(path);
-			return `<details><summary>${pkg.name} <small>v${pkg.version}</small></summary>${licenseHtml}</details>`;
-		} catch (e) {
-			return null;
-		}
-	}
-
-	const licenses = glob.sync('./node_modules/**/LICENSE*');
 	const licenseHtml = getLicenseHtml('./LICENSE');
-	const thirdpartyLicensesHtml = licenses.map(license => getLicenseSectionHtml(license)).join('');
-	const pugs = glob.sync('./docs/**/*.pug');
-	const streams = pugs.map(file => {
+	const streams = glob.sync('./docs/**/*.pug').map(file => {
 		const page = file.replace('./docs/', '').replace('.pug', '');
 		return gulp.src(file)
 			.pipe(pug({
-				locals: Object.assign({
+				locals: {
 					path: page,
 					license: licenseHtml,
-					thirdpartyLicenses: thirdpartyLicensesHtml
-				}, {
-					themeColor: '#f76d6c'
-				})
+					themeColor: constants.themeColor
+				}
 			}))
 			.pipe(gulp.dest('./built/web/about/pages/' + Path.parse(page).dir));
 	});
@@ -209,7 +193,7 @@ gulp.task('build:client:pug', [
 	gulp.src('./src/web/app/*/view.pug')
 		.pipe(pug({
 			locals: {
-				themeColor: '#f76d6c'
+				themeColor: constants.themeColor
 			}
 		}))
 		.pipe(gulp.dest('./built/web/app/'))
diff --git a/package.json b/package.json
index bf01f30b51..d8861bd7f0 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,6 @@
     "@types/rimraf": "0.0.28",
     "@types/riot": "2.6.1",
     "@types/serve-favicon": "2.2.28",
-    "@types/twitter": "0.0.28",
     "@types/uuid": "2.0.29",
     "@types/webpack": "2.2.6",
     "@types/webpack-stream": "3.2.6",
@@ -98,7 +97,6 @@
     "gulp-imagemin": "3.1.1",
     "gulp-pug": "3.2.0",
     "gulp-rename": "1.2.2",
-    "gulp-replace": "0.5.4",
     "gulp-tslint": "7.1.0",
     "gulp-typescript": "3.1.5",
     "gulp-uglify": "2.0.1",
@@ -126,14 +124,13 @@
     "request": "2.79.0",
     "rimraf": "2.6.0",
     "riot": "3.3.1",
-    "riot-compiler": "3.2.1",
     "riot-tag-loader": "1.0.0",
-    "riotify": "2.0.0",
     "rndstr": "1.0.0",
     "s-age": "1.1.0",
     "serve-favicon": "2.4.0",
     "string-replace-webpack-plugin": "0.0.5",
-    "stylus-loader": "^2.5.0",
+    "stylus": "0.54.5",
+    "stylus-loader": "2.5.0",
     "subdomain": "1.2.0",
     "summaly": "2.0.0",
     "swagger-jsdoc": "1.9.1",
@@ -145,7 +142,6 @@
     "uuid": "3.0.1",
     "velocity-animate": "1.4.3",
     "vhost": "3.0.2",
-    "vinyl-named": "1.1.0",
     "webpack": "2.2.1",
     "webpack-stream": "3.2.0",
     "websocket": "1.0.24",
diff --git a/src/const.json b/src/const.json
new file mode 100644
index 0000000000..4c8d05cb53
--- /dev/null
+++ b/src/const.json
@@ -0,0 +1,3 @@
+{
+	"themeColor": "#f76d6c"
+}
diff --git a/webpack.config.ts b/webpack.config.ts
index 00fd3f00a3..19e095a91c 100644
--- a/webpack.config.ts
+++ b/webpack.config.ts
@@ -1,6 +1,8 @@
 import * as webpack from 'webpack';
 const StringReplacePlugin = require('string-replace-webpack-plugin');
 
+const constants = require('./src/const.json');
+
 module.exports = (commit, env) => {
 	const isProduction = env === 'production';
 	const isDebug = !isProduction;
@@ -21,7 +23,7 @@ module.exports = (commit, env) => {
 					loader: StringReplacePlugin.replace({
 						replacements: [
 							{ pattern: /\$theme\-color\-foreground/g, replacement: () => '#fff' },
-							{ pattern: /\$theme\-color/g, replacement: () => '#f76d6c' },
+							{ pattern: /\$theme\-color/g, replacement: () => constants.themeColor },
 						]
 					})
 				},
@@ -62,7 +64,7 @@ module.exports = (commit, env) => {
 			new webpack.DefinePlugin({
 				VERSION: JSON.stringify(commit ? commit.hash : null),
 				CONFIG: {
-					themeColor: JSON.stringify('#f76d6c')
+					themeColor: JSON.stringify(constants.themeColor)
 				}
 			}),
 			new StringReplacePlugin(),