diff --git a/package.json b/package.json
index b8cd9dc..06f360a 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "remark-cli": "^5.0.0",
     "remark-preset-wooorm": "^4.0.0",
     "tape": "^4.0.0",
-    "xo": "^0.20.0"
+    "xo": "^0.21.0"
   },
   "scripts": {
     "format": "remark . -qfo && prettier --write '**/*.js' && xo --fix",