diff --git a/package.json b/package.json
index b7874e9c20..4bd64c5cea 100644
--- a/package.json
+++ b/package.json
@@ -8,6 +8,7 @@
     "babel-plugin-transform-flow-strip-types": "^6.3.13",
     "babel-plugin-transform-runtime": "^6.3.13",
     "babel-preset-es2015": "^6.6.0",
+    "babel-preset-es2015-loose": "^7.0.0",
     "babel-preset-stage-0": "^6.0.0",
     "babel-runtime": "^6.0.0",
     "browserify": "^11.2.0",
@@ -45,8 +46,8 @@
   },
   "babel": {
     "presets": [
-      ["es2015", { "loose": true }],
-      "stage-0"
+      "stage-0",
+      "es2015-loose"
     ],
     "plugins": [
       "./scripts/add-module-exports",