diff --git a/.babelrc b/.babelrc
new file mode 100644
index 0000000..6db26fa
--- /dev/null
+++ b/.babelrc
@@ -0,0 +1,6 @@
+{
+  "presets": ["env"],
+  "plugins": [
+    ["transform-es2015-spread", { "loose": true }],
+  ]
+}
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index a67db4a..4c0a5f6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 # Generated files
 punycode.es6.js
+punycode.es5.js
 
 # Coverage report
 coverage
diff --git a/package.json b/package.json
index 9202ccf..882d2d3 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "version": "2.1.1",
   "description": "A robust Punycode converter that fully complies to RFC 3492 and RFC 5891, and works on nearly all JavaScript platforms.",
   "homepage": "https://mths.be/punycode",
-  "main": "punycode.js",
+  "main": "punycode.es5.js",
   "jsnext:main": "punycode.es6.js",
   "module": "punycode.es6.js",
   "engines": {
@@ -37,13 +37,18 @@
   "files": [
     "LICENSE-MIT.txt",
     "punycode.js",
-    "punycode.es6.js"
+    "punycode.es6.js",
+    "punycode.es5.js"
   ],
   "scripts": {
     "test": "mocha tests",
-    "prepublish": "node scripts/prepublish.js"
+    "build": "babel punycode.js --out-file punycode.es5.js",
+    "prepublish": "npm run build && node scripts/prepublish.js"
   },
   "devDependencies": {
+    "babel-cli": "^6.26.0",
+    "babel-plugin-transform-es2015-spread": "^6.22.0",
+    "babel-preset-env": "^1.7.0",
     "codecov": "^1.0.1",
     "istanbul": "^0.4.1",
     "mocha": "^2.5.3"