diff --git a/bin/6to5-node b/bin/6to5-node
index 9f2ff3adf4..c55ff4eda0 100755
--- a/bin/6to5-node
+++ b/bin/6to5-node
@@ -2,7 +2,6 @@
 
 var commander = require("commander");
 var Module    = require("module");
-var path      = require("path");
 var util      = require("../lib/6to5/util");
 var path      = require("path");
 var repl      = require("repl");
@@ -12,13 +11,29 @@ var _         = require("lodash");
 
 commander.option("-e, --eval [script]", "evaluate script");
 commander.option("-p, --print", "evaluate script and print result");
+commander.option("-i, --ignore [regex]", "ignore all files that match this regex when using the require hook");
+commander.option("-x, --extensions [extensions]", "list of extensions to hook into [.es6,.js]", util.list);
 
 var pkg = require("../package.json");
 commander.version(pkg.version);
 commander.usage("[options] [ -e script | script.js ] [arguments]");
 commander.parse(process.argv);
 
-to5.register();
+//
+
+var registerOpts = {};
+
+if (commander.ignore) {
+  registerOpts.ignoreRegex = new RegExp(commander.ignore);
+}
+
+if (commander.extensions && commander.extensions.length) {
+  registerOpts.extensions = commander.extensions
+}
+
+to5.register(registerOpts);
+
+//
 
 var _eval = function (code, filename) {
   code = to5.transform(code, { filename: filename }).code;
diff --git a/bin/6to5/index.js b/bin/6to5/index.js
index 8d3f8d76e8..0c3c4c3854 100755
--- a/bin/6to5/index.js
+++ b/bin/6to5/index.js
@@ -5,6 +5,8 @@ var sourceMap = require("source-map");
 var transform = require("../../lib/6to5/transform");
 var chokidar  = require("chokidar");
 var mkdirp    = require("mkdirp");
+var util2     = require("../../lib/6to5/util");
+var util      = require("./util");
 var path      = require("path");
 var fs        = require("fs");
 var _         = require("lodash");
@@ -14,12 +16,8 @@ commander.option("-s, --source-maps", "Save source map alongside the compiled co
 commander.option("-f, --filename [filename]", "Filename to use when reading from stdin - this will be used in source-maps, errors etc [stdin]", "stdin");
 commander.option("-w, --watch", "Recompile files on changes");
 
-var list = function (val) {
-  return val ? val.split(",") : [];
-};
-
-commander.option("-w, --whitelist [whitelist]", "Whitelist of transformers to ONLY use", list);
-commander.option("-b, --blacklist [blacklist]", "Blacklist of transformers to NOT use", list);
+commander.option("-w, --whitelist [whitelist]", "Whitelist of transformers to ONLY use", util2.list);
+commander.option("-b, --blacklist [blacklist]", "Blacklist of transformers to NOT use", util2.list);
 commander.option("-o, --out-file [out]", "Compile all input files into a single file");
 commander.option("-d, --out-dir [out]", "Compile an input directory of modules into an output directory");
 
diff --git a/lib/6to5/index.js b/lib/6to5/index.js
index e7fcf8e464..0a1419bfdc 100644
--- a/lib/6to5/index.js
+++ b/lib/6to5/index.js
@@ -4,8 +4,10 @@ var _         = require("lodash");
 
 exports.util = require("./util");
 
-exports.register = function () {
-  return require("./register");
+exports.register = function (opts) {
+  var register = require("./register");
+  if (opts != null) register(opts);
+  return register;
 };
 
 exports.polyfill = function () {
diff --git a/lib/6to5/util.js b/lib/6to5/util.js
index 96e10accae..5d23a33f78 100644
--- a/lib/6to5/util.js
+++ b/lib/6to5/util.js
@@ -20,6 +20,10 @@ exports.ensureBlock = function (node) {
   node.body = b.blockStatement(block);
 };
 
+exports.list = function (val) {
+  return val ? val.split(",") : [];
+};
+
 exports.getUid = function (parent, file) {
   var node;