diff --git a/lib/index.js b/lib/index.js
index a1bb0c1..cf362ff 100755
--- a/lib/index.js
+++ b/lib/index.js
@@ -1,11 +1,11 @@
 var transformTools = require('browserify-transform-tools');
 var transformer = require('./transformer');
 
-const OPTIONS = {
+var OPTIONS = {
   excludeExtensions: ['.json']
 };
 
 module.exports = transformTools.makeStringTransform('jsfuckify', OPTIONS, function (content, transformOptions, done) {
-  const newContent = transformer(content, transformOptions.config);
+  var newContent = transformer(content, transformOptions.config);
   done(null, newContent);
 });