diff --git a/index.js b/index.js
index daf39c3..1502fc5 100644
--- a/index.js
+++ b/index.js
@@ -1,25 +1,28 @@
-var WritableStream = require('stream').Writable
-var inherits = require('util').inherits
+const { Writable } = require('stream')
+const { inherits } = require('util')
 
-module.exports = BrowserStdout
-
-
-inherits(BrowserStdout, WritableStream)
-
-function BrowserStdout(opts) {
+const BrowserStdout = function (opts) {
   if (!(this instanceof BrowserStdout)) return new BrowserStdout(opts)
 
   opts = opts || {}
-  WritableStream.call(this, opts)
-  this.label = (opts.label !== undefined) ? opts.label : 'stdout'
+
+  Writable.call(this, opts)
+
+  this.label = (typeof opts.label === 'undefined') ? 'stdout' : opts.label
 }
 
-BrowserStdout.prototype._write = function(chunks, encoding, cb) {
-  var output = chunks.toString ? chunks.toString() : chunks
+BrowserStdout.prototype._write = function (chunks, encoding, cb) {
+  const output = chunks.toString ? chunks.toString() : chunks
+
   if (this.label === false) {
     console.log(output)
   } else {
-    console.log(this.label+':', output)
+    console.log(this.label + ':', output)
   }
+
   process.nextTick(cb)
 }
+
+inherits(BrowserStdout, Writable)
+
+module.exports = BrowserStdout
diff --git a/package-lock.json b/package-lock.json
index 05422c1..f7308c2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,5 +1,5 @@
 {
   "name": "browser-stdout",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "lockfileVersion": 1
 }