diff --git a/error_pages/404.html b/error_pages/404.html
index b39fbe7..8fd5a02 100644
--- a/error_pages/404.html
+++ b/error_pages/404.html
@@ -2,6 +2,16 @@
 <html lang="en" dir="ltr">
 
 <head>
+	<!-- Global site tag (gtag.js) - Google Analytics -->
+	<script async src="https://www.googletagmanager.com/gtag/js?id=UA-136337666-1"></script>
+	<script>
+		window.dataLayer = window.dataLayer || [];
+		function gtag(){dataLayer.push(arguments);}
+		gtag('js', new Date());
+
+	 	gtag('config', 'UA-136337666-1');
+	</script>
+
 	<meta charset="utf-8">
 	<meta name="viewport" content="width=device-width, initial-scale=1" />
 	<link href="https://fonts.googleapis.com/css?family=Roboto|Roboto+Mono" rel="stylesheet">
diff --git a/index.html b/index.html
index f9201c5..2339f00 100644
--- a/index.html
+++ b/index.html
@@ -2,6 +2,16 @@
 <html lang="en" dir="ltr">
 
 <head>
+	<!-- Global site tag (gtag.js) - Google Analytics -->
+	<script async src="https://www.googletagmanager.com/gtag/js?id=UA-136337666-1"></script>
+	<script>
+		window.dataLayer = window.dataLayer || [];
+		function gtag(){dataLayer.push(arguments);}
+		gtag('js', new Date());
+
+	 	gtag('config', 'UA-136337666-1');
+	</script>
+
 	<meta charset="utf-8">
 	<meta name="viewport" content="width=device-width, initial-scale=1" />
 	<link rel="stylesheet" href="assets/styles/styles.css">
diff --git a/nl/index.html b/nl/index.html
index 705b05f..b6a5d29 100644
--- a/nl/index.html
+++ b/nl/index.html
@@ -2,6 +2,16 @@
 <html lang="nl" dir="ltr">
 
 <head>
+	<!-- Global site tag (gtag.js) - Google Analytics -->
+	<script async src="https://www.googletagmanager.com/gtag/js?id=UA-136337666-1"></script>
+	<script>
+		window.dataLayer = window.dataLayer || [];
+		function gtag(){dataLayer.push(arguments);}
+		gtag('js', new Date());
+
+	 	gtag('config', 'UA-136337666-1');
+	</script>
+
 	<meta charset="utf-8">
 	<title></title>
 </head>
