diff --git a/package.json b/package.json
index 94763fa..9c0b7f5 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "lint-staged": "^7.0.0"
   },
   "engines": {
-    "node": ">=6.0.0",
+    "node": ">=6.9.0",
     "npm": ">=3.0.0"
   },
   "author": "CKSource (http://cksource.com/)",