diff --git a/index.html b/index.html
index ddd0495..245b6c9 100644
--- a/index.html
+++ b/index.html
@@ -25,27 +25,27 @@
         <meta name="description" content="Replication of the Luhn Algorithm - by Matthew Grove">
 
         <!-- import Roboto (font) -->
-        <link href="/assets/roboto.css" rel="stylesheet">
+        <link href="/assets/roboto.css" rel="stylesheet" type="text/css">
 
         <!-- import jQuery -->
-        <script src="/assets/jquery.min.js"></script>
+        <script src="/assets/jquery.min.js" type="text/javascript"></script>
 
         <!-- import cookie JavaScript -->
-        <script src="/assets/cookies.js"></script>
+        <script src="/assets/cookies.js" type="text/javascript"></script>
 
         <!-- import Material Design components & icons -->
-        <link href="/assets/material-components-web.min.css" rel="stylesheet">
-        <link href="/assets/material_icons.css" rel="stylesheet">
-        <script src="/assets/material-components-web.min.js"></script>
+        <link href="/assets/material-components-web.min.css" rel="stylesheet" type="text/css">
+        <link href="/assets/material_icons.css" rel="stylesheet" type="text/css">
+        <script src="/assets/material-components-web.min.js" type="text/javascript"></script>
 
         <!-- import local styling & scripts -->
-        <script src="/assets/global.js"></script>
-        <link href="/assets/global.css" rel="stylesheet">
-        <script src="script.js"></script>
+        <script src="/assets/global.js" type="text/javascript"></script>
+        <link href="/assets/global.css" rel="stylesheet" type="text/css">
+        <script src="script.js" type="text/javascript"></script>
 
         <!-- Global site tag (gtag.js) - Google Analytics -->
-        <script async src="https://www.googletagmanager.com/gtag/js?id=UA-124505000-1"></script>
-        <script>
+        <script async src="https://www.googletagmanager.com/gtag/js?id=UA-124505000-1" type="text/javascript"></script>
+        <script type="text/javascript">
             window.dataLayer = window.dataLayer || [];
             function gtag(){dataLayer.push(arguments);}
             gtag('js', new Date());
diff --git a/luhn-algorithm/index.html b/luhn-algorithm/index.html
index feb996f..ae73d01 100644
--- a/luhn-algorithm/index.html
+++ b/luhn-algorithm/index.html
@@ -25,27 +25,27 @@
         <meta name="description" content="Replication of the Luhn Algorithm - by Matthew Grove">
 
         <!-- import Roboto (font) -->
-        <link href="/assets/roboto.css" rel="stylesheet">
+        <link href="/assets/roboto.css" rel="stylesheet" type="text/css">
 
         <!-- import jQuery -->
-        <script src="/assets/jquery.min.js"></script>
+        <script src="/assets/jquery.min.js" type="text/javascript"></script>
 
         <!-- import cookie JavaScript -->
-        <script src="/assets/cookies.js"></script>
+        <script src="/assets/cookies.js" type="text/javascript"></script>
 
         <!-- import Material Design components & icons -->
-        <link href="/assets/material-components-web.min.css" rel="stylesheet">
-        <link href="/assets/material_icons.css" rel="stylesheet">
-        <script src="/assets/material-components-web.min.js"></script>
+        <link href="/assets/material-components-web.min.css" rel="stylesheet" type="text/css">
+        <link href="/assets/material_icons.css" rel="stylesheet" type="text/css">
+        <script src="/assets/material-components-web.min.js" type="text/javascript"></script>
 
         <!-- import local styling & scripts -->
-        <script src="script.js"></script>
-        <script src="/assets/global.js"></script>
-        <link href="/assets/global.css" rel="stylesheet">
+        <script src="script.js" type="text/javascript"></script>
+        <script src="/assets/global.js" type="text/javascript"></script>
+        <link href="/assets/global.css" rel="stylesheet" type="text/css">
 
         <!-- Global site tag (gtag.js) - Google Analytics -->
-        <script async src="https://www.googletagmanager.com/gtag/js?id=UA-124505000-1"></script>
-        <script>
+        <script async src="https://www.googletagmanager.com/gtag/js?id=UA-124505000-1" type="text/javascript"></script>
+        <script type="text/javascript">
             window.dataLayer = window.dataLayer || [];
             function gtag(){dataLayer.push(arguments);}
             gtag('js', new Date());