diff --git a/src/components/layout/BaseHead.astro b/src/components/layout/BaseHead.astro
index 6eac6ef..3087f1d 100644
--- a/src/components/layout/BaseHead.astro
+++ b/src/components/layout/BaseHead.astro
@@ -45,3 +45,14 @@ const imageUrl = ogImage ? new URL(ogImage, Astro.url) : new URL('/og/chiri-og.p
 <meta property="twitter:title" content={title} />
 <meta property="twitter:description" content={description} />
 <meta property="twitter:image" content={imageUrl} />
+
+<!-- Google tag (gtag.js) -->
+<script async src="https://www.googletagmanager.com/gtag/js?id=G-QG1BRT6R0V"></script>
+<script>
+  // @ts-nocheck
+  window.dataLayer = window.dataLayer || [];
+  function gtag(){dataLayer.push(arguments);}
+  gtag('js', new Date());
+
+  gtag('config', 'G-QG1BRT6R0V');
+</script>
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