diff --git a/lib/module.js b/lib/module.js
index 99e3281..206949a 100644
--- a/lib/module.js
+++ b/lib/module.js
@@ -37,7 +37,7 @@ module.exports = function (moduleOptions) {
 
   this.options.head.script.push({
     src: `https://www.googletagmanager.com/gtag/js?id=${options.id}`,
-    async: true
+    defer: true
   })
 }