diff --git a/gulpfile.js b/gulpfile.js
index 2c16631..47232b2 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -1,67 +1,72 @@
 'use strict';
 
 var babelify = require('babelify');
 var browserify = require('browserify');
 var source = require('vinyl-source-stream');
 var buffer = require('vinyl-buffer');
 var gulp = require('gulp');
 var jshint = require('gulp-jshint');
 var stylish = require('jshint-stylish');
 var uglify = require('gulp-uglify');
-var gutil = require('gulp-util');
 var filelog = require('gulp-filelog');
 var header = require('gulp-header');
 var sourcemaps = require('gulp-sourcemaps');
-
+var through = require('through2');
+var parseArgs = require('minimist');
 var fs = require('fs');
 var path = require('path');
 
 var PKG_INFO = require('./package.json');
 
 // gulp-header.
 var BANNER = fs.readFileSync('banner.txt').toString();
 var BANNER_OPTS = {
     pkg: PKG_INFO,
     currentYear: (new Date()).getFullYear()
 };
 
+var noop = function() {
+    return through.obj();
+}
+
+var env = parseArgs(process.argv.slice(2));
 
 gulp.task('lint', function () {
     return gulp.src('lib/**/*.js')
         .pipe(filelog('lint'))
         .pipe(jshint('.jshintrc'))
         .pipe(jshint.reporter(stylish));
 });
 
 
 gulp.task('build', function () {
     var dest;
-    var isProduction = (gutil.env.type === 'production');
+    var isProduction = (env.type === 'production');
     if (isProduction) {
         dest = PKG_INFO.name + '.min.js';
     } else {
         dest = PKG_INFO.name + '.js';
     }
     return browserify([path.join(__dirname, PKG_INFO.main)],
                       {standalone: PKG_INFO.name,
                        debug: true})
         .transform(babelify)
         .bundle()
         .pipe(source(dest))
         .pipe(buffer())
         .pipe(sourcemaps.init({loadMaps: true}))
         .pipe(filelog('build'))
-        .pipe(isProduction ? uglify({mangle: false}) : gutil.noop())
+        .pipe(isProduction ? uglify({mangle: false}) : noop())
         .pipe(header(BANNER, BANNER_OPTS))
         .pipe(sourcemaps.write('.'))
         .pipe(gulp.dest('dist/'));
 });
 
 
 gulp.task('watch', function() {
     gulp.watch(['lib/**/*.js'], gulp.series('lint', 'build'));
 });
 
 
 gulp.task('dist', gulp.series('lint', 'build'));
 gulp.task('default', gulp.series('dist'));
diff --git a/package.json b/package.json
index 11dc777..d2652fa 100644
--- a/package.json
+++ b/package.json
@@ -1,49 +1,50 @@
 {
   "name": "sylkrtc",
   "version": "1.0.1",
   "main": "lib/sylkrtc.js",
   "description": "SylkServer WebRTC Gateway client library",
   "repository": {
     "type": "git",
     "url": "git://github.com/AGProjects/sylkrtc.git"
   },
   "keywords": [],
   "author": "AG Projects",
   "contributors": [
     "Tijmen de Mes <tijmen@ag-projects.com>",
     "Saúl Ibarra Corretgé <saul@ag-projects.com>"
   ],
   "license": "MIT",
   "readmeFilename": "README.md",
   "browserify": {
     "transform": [
       "babelify"
     ]
   },
   "dependencies": {
     "attachmediastream": "^2.0.0",
     "blueimp-md5": "^2.10.0",
     "bowser": "^2.7.0",
     "debug": "^2.6.8",
     "sdp-transform": "^2.3.0",
     "uuid": "^3.1.0",
     "webrtc-adapter": "4.1.1",
     "websocket": "^1.0.28"
   },
   "devDependencies": {
     "babel-preset-es2015": "^6.9.0",
     "babelify": "^7.3.0",
     "browserify": "^16.5.0",
     "gulp": "^4.0.2",
     "gulp-filelog": "^0.4.1",
     "gulp-header": "^2.0.9",
     "gulp-jshint": "^2.0.1",
     "gulp-sourcemaps": "^2.6.1",
     "gulp-uglify": "^3.0.0",
-    "gulp-util": "^3.0.7",
     "jshint": "^2.9.5",
     "jshint-stylish": "^2.2.0",
+    "minimist": "^1.2.0",
+    "through2": "^3.0.1",
     "vinyl-buffer": "^1.0.0",
     "vinyl-source-stream": "^2.0.0"
   }
 }