diff --git a/package.json b/package.json
index c535317..13b38b6 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "babel-plugin-transform-async-to-generator": "^6.1.18",
     "babel-plugin-transform-runtime": "^6.1.18",
     "babel-polyfill": "^6.2.0",
-    "babel-preset-es2015": "^6.1.18",
+    "babel-preset-es2015": "^6.6.0",
     "babel-preset-stage-0": "^6.1.18",
     "babel-runtime": "^6.2.0",
     "mocha": "^2.3.4",