diff --git a/api/demo/css/style.css b/api/demo/css/style.css
index 014312c9..6ae2b6a1 100644
--- a/api/demo/css/style.css
+++ b/api/demo/css/style.css
@@ -1,3 +1,5 @@
+<?php header("Content-type: text/css"); ?>
+
 html {
   -webkit-box-sizing: border-box;
   -moz-box-sizing: border-box;
diff --git a/api/demo/css/toggle-dark.css b/api/demo/css/toggle-dark.css
index 1fe526f3..45977512 100644
--- a/api/demo/css/toggle-dark.css
+++ b/api/demo/css/toggle-dark.css
@@ -1,3 +1,5 @@
+<?php header("Content-type: text/css"); ?>
+
 a.darkmode {
   position: fixed;
   top: 2em;
diff --git a/api/demo/index.php b/api/demo/index.php
index 76936952..5017d83b 100644
--- a/api/demo/index.php
+++ b/api/demo/index.php
@@ -47,8 +47,8 @@ function gtag() {
     </script>
     <title>GitHub Readme Streak Stats Demo</title>
     <link href="https://css.gg/css?=|moon|sun" rel="stylesheet">
-    <link rel="stylesheet" href="https://streak-stats.demolab.com/demo/css/style.css">
-    <link rel="stylesheet" href="https://streak-stats.demolab.com/demo/css/toggle-dark.css">
+    <link rel="stylesheet" href="./css/style.css">
+    <link rel="stylesheet" href="./css/toggle-dark.css">
 
     <!-- Favicons -->
     <link rel="apple-touch-icon" sizes="180x180" href="apple-touch-icon.png">
@@ -56,10 +56,10 @@ function gtag() {
     <link rel="icon" type="image/png" sizes="32x32" href="favicon-32x32.png">
     <link rel="mask-icon" href="icon.svg" color="#fb8c00">
 
-    <script type="text/javascript" src="https://streak-stats.demolab.com/demo/js/script.js" defer></script>
-    <script type="text/javascript" src="https://streak-stats.demolab.com/demo/js/accordion.js" defer></script>
-    <script type="text/javascript" src="https://streak-stats.demolab.com/demo/js/toggle-dark.js" defer></script>
-    <script type="text/javascript" src="https://streak-stats.demolab.com/demo/js/jscolor.min.js" defer></script>
+    <script type="text/javascript" src="./js/script.js" defer></script>
+    <script type="text/javascript" src="./js/accordion.js" defer></script>
+    <script type="text/javascript" src="./js/toggle-dark.js" defer></script>
+    <script type="text/javascript" src="./js/jscolor.min.js" defer></script>
     <script async defer src="https://buttons.github.io/buttons.js"></script>
 </head>
 
diff --git a/vercel.json b/vercel.json
index 35c77e0c..77048049 100644
--- a/vercel.json
+++ b/vercel.json
@@ -6,7 +6,7 @@
         { "src": "/", "dest": "/api/index.php" }
     ],
     "functions": {
-        "api/**/*.php": {
+        "api/**/*": {
             "runtime": "vercel-php@0.5.2"
         }
     }