diff --git a/package.json b/package.json
index 72abc336..db78bedc 100644
--- a/package.json
+++ b/package.json
@@ -21,9 +21,7 @@
     "node": ">=6.9.0"
   },
   "xo": {
-    "extends": [
-      "prettier"
-    ]
+    "extends": "prettier"
   },
   "lint-staged": {
     "*.js": [