diff --git a/package.json b/package.json
index 09447fc..1d9b956 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "babel-istanbul": "^0.6.0",
     "babel-plugin-add-module-exports": "~0.1.2",
     "babel-polyfill": "^6.3.14",
-    "babel-preset-es2015": "~6.3.13",
+    "babel-preset-es2015": "~6.6.0",
     "babel-preset-stage-0": "~6.3.13",
     "coveralls": "~2.11.4",
     "eslint": "~1.10.3",