diff --git a/package.json b/package.json
index 734626c..93d0c42 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
   },
   "devDependencies": {
     "babel": "^6.3.26",
+    "babel-core": "^6.10.4",
     "babel-jest": "^6.0.1",
     "babel-preset-airbnb": "^1.0.1",
     "chai": "^3.4.1",