diff --git a/package.json b/package.json
index ccedf0b..a74620c 100644
--- a/package.json
+++ b/package.json
@@ -40,6 +40,6 @@
     "nyc": "^11.0.2",
     "pretty-bytes": "^4.0.2",
     "time-span": "^2.0.0",
-    "xo": "^0.19.0"
+    "xo": "^0.21.0"
   }
 }