diff --git a/index.html b/index.html
index 3eeb718..95080d1 100644
--- a/index.html
+++ b/index.html
@@ -31,6 +31,18 @@
 		<meta property="og:type" content="website" />
 		<meta property="og:locale" content="en_US" />
 		<meta property="og:locale:alternate" content="zh_CN" />
+
+		<!-- Google tag (gtag.js) -->
+		<script async src="https://www.googletagmanager.com/gtag/js?id=G-HCGRJTN3HM"></script>
+		<script>
+			window.dataLayer = window.dataLayer || []
+			function gtag() {
+				dataLayer.push(arguments)
+			}
+			gtag('js', new Date())
+
+			gtag('config', 'G-HCGRJTN3HM')
+		</script>
 	</head>
 	<body>
 		<div id="root"></div>
