diff --git a/bower.json b/bower.json
index 5c9ae17c6..fbbc43c03 100644
--- a/bower.json
+++ b/bower.json
@@ -1,17 +1,6 @@
 {
-  "name": "system.js",
-  "version": "0.12.1",
-  "main": "dist/system.js",
-  "dependencies": {
-    "es6-module-loader": "~0.12.0",
-    "traceur-runtime": "~0.0.82"
-  },
+  "name": "systemjs",
   "devDependencies": {
     "qunit": "~1.12.0"
-  },
-  "ignore": [
-    "test",
-    "Makefile",
-    "package.json"
-  ]
+  }
 }
diff --git a/lib/extension-es6.js b/lib/extension-es6.js
index d739e98c2..8e1dacd10 100644
--- a/lib/extension-es6.js
+++ b/lib/extension-es6.js
@@ -5,26 +5,26 @@ function es6(loader) {
 
   loader._extensions.push(es6);
 
-  var parser, parserName, parserModule, parserRuntimeModule, parserRuntimeGlobal;
+  var transpiler, transpilerName, transpilerModule, transpilerRuntimeModule, transpilerRuntimeGlobal;
 
   var isBrowser = typeof window != 'undefined';
 
-  function setParser(name) {
-    parser = name;
-    parserName = this.parser == '6to5' ? 'to5' : parser;
-    parserModule = '@' + parser;
-    parserRuntimeModule = '@' + parser + '-runtime';
-    parserRuntimeGlobal = (parserName == 'to5' ? parserName : '$' + parserName) + 'Runtime';
+  function setTranspiler(name) {
+    transpiler = name;
+    transpilerName = this.transpiler == '6to5' ? 'to5' : transpiler;
+    transpilerModule = '@' + transpiler;
+    transpilerRuntimeModule = '@' + transpiler + '-runtime';
+    transpilerRuntimeGlobal = (transpilerName == 'to5' ? transpilerName : '$' + transpilerName) + 'Runtime';
 
-    // auto-detection of paths to loader parser files
+    // auto-detection of paths to loader transpiler files
     if (typeof $__curScript != 'undefined') {
-      if (!loader.paths[parserModule])
-        loader.paths[parserModule] = $__curScript.getAttribute('data-' + loader.parser + '-src')
+      if (!loader.paths[transpilerModule])
+        loader.paths[transpilerModule] = $__curScript.getAttribute('data-' + loader.transpiler + '-src')
           || ($__curScript.src ? $__curScript.src.substr(0, $__curScript.src.lastIndexOf('/') + 1)
             : loader.baseURL + (loader.baseURL.lastIndexOf('/') == loader.baseURL.length - 1 ? '' : '/')
-            ) + loader.parser + '.js';
-      if (!loader.paths[parserRuntimeModule])
-        loader.paths[parserRuntimeModule] = $__curScript.getAttribute('data-' + loader.parser + '-runtime-src') || loader.paths[parserModule].replace(/\.js$/, '-runtime.js');
+            ) + loader.transpiler + '.js';
+      if (!loader.paths[transpilerRuntimeModule])
+        loader.paths[transpilerRuntimeModule] = $__curScript.getAttribute('data-' + loader.transpiler + '-runtime-src') || loader.paths[transpilerModule].replace(/\.js$/, '-runtime.js');
     }
   }
 
@@ -33,31 +33,30 @@ function es6(loader) {
 
   var loaderTranslate = loader.translate;
   loader.translate = function(load) {
-    // update parser info if necessary
-    if (this.parser !== parser)
-      setParser(this.parser);
+    // update transpiler info if necessary
+    if (this.transpiler !== transpiler)
+      setTranspiler(this.transpiler);
 
     var loader = this;
 
-    if (load.name == parserModule || load.name == parserRuntimeModule)
+    if (load.name == transpilerModule || load.name == transpilerRuntimeModule)
       return loaderTranslate.call(loader, load);
 
     // detect ES6
     else if (load.metadata.format == 'es6' || !load.metadata.format && load.source.match(es6RegEx)) {
       load.metadata.format = 'es6';
 
-      // dynamically load parser for ES6 if necessary
-      if (isBrowser && !loader.global[parserName]) {
-        return loader['import'](parserModule).then(function() {
+      // dynamically load transpiler for ES6 if necessary
+      if (isBrowser && !loader.global[transpilerName])
+        return loader['import'](transpilerModule).then(function() {
           return loaderTranslate.call(loader, load);
         });
-      }
     }
 
-    // dynamically load parser runtime if necessary
-    if (isBrowser && !loader.global[parserRuntimeGlobal] && load.source.indexOf(parserRuntimeGlobal) != -1) {
+    // dynamically load transpiler runtime if necessary
+    if (isBrowser && !loader.global[transpilerRuntimeGlobal] && load.source.indexOf(transpilerRuntimeGlobal) != -1) {
       var System = $__global.System;
-      return loader['import'](parserRuntimeModule).then(function() {
+      return loader['import'](transpilerRuntimeModule).then(function() {
         // traceur runtme annihilates System global
         $__global.System = System;
         return loaderTranslate.call(loader, load);
@@ -67,11 +66,11 @@ function es6(loader) {
     return loaderTranslate.call(loader, load);
   }
 
-  // always load parser as a global
+  // always load transpiler as a global
   var loaderInstantiate = loader.instantiate;
   loader.instantiate = function(load) {
     var loader = this;
-    if (isBrowser && (load.name == parserModule || load.name == parserRuntimeModule)) {
+    if (isBrowser && (load.name == transpilerModule || load.name == transpilerRuntimeModule)) {
       loader.__exec(load);
       return {
         deps: [],
diff --git a/package.json b/package.json
index daa4d5adb..62c059305 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "systemjs",
-  "version": "0.12.1",
+  "version": "0.12.0",
   "description": "System loader extension for flexible AMD & CommonJS support",
   "main": "dist/system.src.js",
   "repository": {
@@ -10,10 +10,10 @@
   "author": "Guy Bedford",
   "license": "MIT",
   "dependencies": {
-    "es6-module-loader": "~0.12.0"
+    "es6-module-loader": "~0.13.0"
   },
   "devDependencies": {
-    "6to5": "^3.0.0",
+    "6to5-core": "~3.3.2",
     "qunit": "^0.6.2",
     "uglify-js": "~2.4.13"
   },
diff --git a/test/test-6to5.html b/test/test-6to5.html
index df586a936..7aa329145 100644
--- a/test/test-6to5.html
+++ b/test/test-6to5.html
@@ -15,9 +15,9 @@ <h2 id="qunit-userAgent"></h2>
 
 		<!-- <script src="../bower_components/traceur/traceur.js"></script> -->
 		<script src="../bower_components/es6-module-loader/dist/es6-module-loader.src.js"></script>
-		<script src="../dist/system.src.js" data-6to5-src="../node_modules/6to5/browser.js" type="text/javascript"></script>
+		<script src="../dist/system.src.js" data-6to5-src="../node_modules/6to5-core/browser.js" type="text/javascript"></script>
 		<script>
-			System.parser = '6to5';
+			System.transpiler = '6to5';
 			System['import']('test')['catch'](function(e) {
 				setTimeout(function() {
 					throw e;
diff --git a/test/test-traceur.html b/test/test-traceur.html
index 945e06cac..1e4c2c46a 100644
--- a/test/test-traceur.html
+++ b/test/test-traceur.html
@@ -20,7 +20,7 @@ <h2 id="qunit-userAgent"></h2>
 			System.traceurOptions = { asyncFunctions: true };
 			System['import']('test')['catch'](function(e) {
 				setTimeout(function() {
-					throw e;
+					throw e.stack || e;
 				})
 			});
 		</script>
diff --git a/test/test.js b/test/test.js
index 4eaf008bd..95677ce77 100644
--- a/test/test.js
+++ b/test/test.js
@@ -654,14 +654,14 @@ asyncTest('Relative dyanamic loading', function() {
 asyncTest('ES6 Circular', function() {
   System['import']('tests/es6-circular1').then(function(m) {
     ok(m.q == 3, 'Binding not allocated');
-    if (System.parser != '6to5') ok(m.r == 3, 'Binding not updated');
+    if (System.transpiler != '6to5') ok(m.r == 3, 'Binding not updated');
     start();
   }, err);
 });
 
 asyncTest('AMD & CJS circular, ES6 Circular', function() {
   System['import']('tests/all-circular1').then(function(m) {
-    if (System.parser != '6to5') ok(m.q == 4);
+    if (System.transpiler != '6to5') ok(m.q == 4);
     ok(m.o.checkObj() == 'changed');
     start();
   }, err);