diff --git a/index.js b/index.js
index e419174..00bd366 100644
--- a/index.js
+++ b/index.js
@@ -28,6 +28,7 @@ Object.keys(ansiStyles).forEach(function (key) {
 	};
 });
 
+// eslint-disable-next-line func-names
 var proto = defineProps(function chalk() {}, styles);
 
 function build(_styles) {
diff --git a/package.json b/package.json
index 8baa69a..70bac94 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,7 @@
     "require-uncached": "^1.0.2",
     "resolve-from": "^2.0.0",
     "semver": "^5.1.0",
-    "xo": "*"
+    "xo": "^0.16.0"
   },
   "xo": {
     "envs": [