diff --git a/support/compile.js b/support/compile.js
index 6d3a5eb2..517ab2de 100644
--- a/support/compile.js
+++ b/support/compile.js
@@ -3,13 +3,13 @@
  * Module dependencies.
  */
 
-var fs = require('fs');
+let fs = require('fs');
 
 /**
  * Arguments.
  */
 
-var args = process.argv.slice(2)
+let args = process.argv.slice(2)
   , pending = args.length
   , files = {};
 
@@ -18,7 +18,7 @@ console.log('');
 // parse arguments
 
 args.forEach(function(file){
-  var mod = file.replace('lib/', '');
+  let mod = file.replace('lib/', '');
   fs.readFile(file, 'utf8', function(err, js){
     if (err) throw err;
     console.log('  \033[90mcompile : \033[0m\033[36m%s\033[0m', file);
@@ -56,7 +56,7 @@ function parseInheritance(js) {
  */
 
 function parseConditionals(js) {
-  var lines = js.split('\n')
+  let lines = js.split('\n')
     , len = lines.length
     , buffer = true
     , browser = false
@@ -64,7 +64,7 @@ function parseConditionals(js) {
     , line
     , cond;
 
-  for (var i = 0; i < len; ++i) {
+  for (let i = 0; i < len; ++i) {
     line = lines[i];
     if (/^ *\/\/ *if *(node|browser)/gm.exec(line)) {
       cond = RegExp.$1;
@@ -87,7 +87,7 @@ function parseConditionals(js) {
  */
 
 function compile() {
-  var buf = '';
+  let buf = '';
   buf += 'ejs = (function(){\n';
   buf += '\n// CommonJS require()\n\n';
   buf += browser.require + '\n\n';
@@ -96,7 +96,7 @@ function compile() {
   buf += 'require.register = ' + browser.register + ';\n\n';
   buf += 'require.relative = ' + browser.relative + ';\n\n';
   args.forEach(function(file){
-    var js = files[file];
+    let js = files[file];
     file = file.replace('lib/', '');
     buf += '\nrequire.register("' + file + '", function(module, exports, require){\n';
     buf += js;
@@ -113,7 +113,7 @@ function compile() {
 // refactored version of weepy's
 // https://github.com/weepy/brequire/blob/master/browser/brequire.js
 
-var browser = {
+let browser = {
   
   /**
    * Require a module.
@@ -174,4 +174,4 @@ var browser = {
   register: function(path, fn){
     require.modules[path] = fn;
   }
-};
\ No newline at end of file
+};