diff --git a/gulpfile.js b/gulpfile.js
index 037d1c1..04e8c07 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -54,7 +54,9 @@ gulp.task('default', function () {
     .pipe(sourcemaps.init())
     .pipe(babel({
       presets: ['es2015-node4'],
-      plugins: ['add-module-exports']
+      plugins: ['add-module-exports'],
+      comments: false,
+      babelrc: false,
     }))
     .on('error', reportError)
     .pipe(sourcemaps.write('.'))
diff --git a/package.json b/package.json
index fe772a7..f6a5346 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,6 @@
   "license": "MIT",
   "devDependencies": {
     "babel-plugin-add-module-exports": "^0.2.1",
-    "babel-preset-es2015": "^6.6.0",
     "babel-preset-es2015-node4": "^2.1.0",
     "chai": "^3.5.0",
     "gulp": "^3.9.1",