diff --git a/index.js b/index.js
index e618d11..1c97152 100644
--- a/index.js
+++ b/index.js
@@ -1,5 +1,5 @@
-"use strict";
+'use strict';
 
 module.exports = function isObject(x) {
-	return typeof x === "object" && x !== null;
+	return typeof x === 'object' && x !== null;
 };