diff --git a/package.json b/package.json
index 0a46014..547bbab 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,7 @@
     "babel-loader": "^6.2.4",
     "babel-plugin-transform-object-assign": "^6.8.0",
     "babel-preset-es2015": "^6.6.0",
+    "babel-preset-es2015-loose": "^7.0.0",
     "babel-preset-react": "^6.5.0",
     "babel-preset-stage-1": "^6.5.0",
     "byte-size": "^2.0.0",
@@ -64,9 +65,9 @@
   },
   "babel": {
     "presets": [
-      "es2015",
-      "react",
-      "stage-1"
+      "es2015-loose",
+      "stage-1",
+      "react"
     ],
     "plugins": [
       "transform-object-assign"