diff --git a/package.json b/package.json
index 436c92c..f419e72 100644
--- a/package.json
+++ b/package.json
@@ -66,6 +66,6 @@
     "standard-version": "4.3.0",
     "wc-loader": "1.1.12",
     "webpack": "3.11.0",
-    "xo": "0.18.2"
+    "xo": "0.21.0"
   }
 }