diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3c3629e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules
diff --git a/.travis.yml b/.travis.yml
index f178ec0..c159f6a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,3 @@
 language: node_js
 node_js:
-  - 'node'
+  - lts/*
diff --git a/examples/node-download.js b/examples/node-download.js
index bbd9e1f..8739dd7 100644
--- a/examples/node-download.js
+++ b/examples/node-download.js
@@ -1,24 +1,24 @@
-// var WebTorrent = require('webtorrent-hybrid')
-var WebTorrent = require('../index')
-var fs = require('fs')
+const WebTorrent = require('../index')
+const fs = require('fs')
 
-var client = new WebTorrent()
+const client = new WebTorrent()
 
-var torrentId = 'magnet:?xt=urn:btih:6a9759bffd5c0af65319979fb7832189f4f3c35d'
+const torrentId = 'magnet:?xt=urn:btih:6a9759bffd5c0af65319979fb7832189f4f3c35d'
 
 console.log('torrentId:\t', torrentId)
 
-client.add(torrentId, function (torrent) {
-  var files = torrent.files
-  var length = files.length
+client.add(torrentId, torrent => {
+  const files = torrent.files
+  let length = files.length
   // Stream each file to the disk
-  files.forEach(function (file) {
-    var source = file.createReadStream()
-    var destination = fs.createWriteStream(file.name)
-    source.on('end', function () {
+  files.forEach(file => {
+    const source = file.createReadStream()
+    const destination = fs.createWriteStream(file.name)
+    source.on('end', () => {
       console.log('file:\t\t', file.name)
       // close after all files are saved
-      if (!--length) process.exit()
+      length -= 1
+      if (!length) process.exit()
     }).pipe(destination)
   })
 })
diff --git a/examples/node-seed.js b/examples/node-seed.js
index e63894e..7848792 100644
--- a/examples/node-seed.js
+++ b/examples/node-seed.js
@@ -1,13 +1,11 @@
-// var WebTorrent = require('webtorrent-hybrid')
-var WebTorrent = require('../index')
+const WebTorrent = require('../index')
 
-var client = new WebTorrent()
-
-var filePath = './node-seed.js'
+const client = new WebTorrent()
+const filePath = __filename
 
 console.log('filePath:', filePath)
 
-client.seed(filePath, function (torrent) {
+client.seed(filePath, torrent => {
   console.log('torrentId (info hash):', torrent.infoHash)
   // console.log('torrentId (magnet link):', torrent.magnetURI)
 })
diff --git a/lib/global.js b/lib/global.js
index 1f6d163..6673590 100644
--- a/lib/global.js
+++ b/lib/global.js
@@ -1,13 +1,8 @@
-var createTorrent = require('create-torrent')
+const createTorrent = require('create-torrent')
+const wrtc = require('wrtc')
 
 global.WEBTORRENT_ANNOUNCE = createTorrent.announceList
-  .map(function (arr) {
-    return arr[0]
-  })
-  .filter(function (url) {
-    return url.indexOf('wss://') === 0 || url.indexOf('ws://') === 0
-  })
-
-var wrtc = require('wrtc')
+  .map(arr => arr[0])
+  .filter(url => url.indexOf('wss://') === 0 || url.indexOf('ws://') === 0)
 
 global.WRTC = wrtc
diff --git a/package.json b/package.json
index 5088d6c..7514a97 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "standard": "*"
   },
   "engines": {
-    "node": ">=4"
+    "node": ">=6"
   },
   "homepage": "http://webtorrent.io",
   "keywords": [