diff --git a/.babelrc b/.babelrc
index b63809e..a3b9053 100644
--- a/.babelrc
+++ b/.babelrc
@@ -1,8 +1,8 @@
 {
   "presets": [
     [ "env"
-    , { targets: { node: 4 }
-      , useBuiltIns: true
+    , { targets:
+        { node: 4 }
       }
     ]
   ],
@@ -11,4 +11,4 @@
       "plugins": [ "istanbul" ]
     }
   }
-}
+}
\ No newline at end of file