diff --git a/src/index.tsx b/src/index.tsx
index 3709d38..b079361 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -18,11 +18,16 @@ window.__ENV__ = {
     NODE_ENV: process.env.REACT_APP_ENV as string,
 };
 
+window.dataLayer = window.dataLayer || [];
 if (isProduction()) {
+    window.gtag = function(...args: any[]) {
+        window.dataLayer.push(args);
+    };
     window.gtag("config", "G-NJFP4YL0X3", {
         allow_google_signals: false,
         allow_ad_personalization_signals: false,
     });
+    window.gtag("js", new Date());
     Sentry.init({ dsn: "https://6b96accd47ff467da8394a51da93d909@o415139.ingest.sentry.io/5305794" });
 } else {
     console.info("Google Analytics disabled because runtime does not running in production.");
diff --git a/src/react-app-env.d.ts b/src/react-app-env.d.ts
index 07eb038..af95072 100644
--- a/src/react-app-env.d.ts
+++ b/src/react-app-env.d.ts
@@ -4,4 +4,5 @@ interface Window {
         NODE_ENV: string;
     };
     gtag: Function;
+    dataLayer: Array;
 }