diff --git a/public/index.php b/public/index.php
index 30ae2ad..26b2571 100644
--- a/public/index.php
+++ b/public/index.php
@@ -101,6 +101,20 @@ if($reqPath === '/metadata') {
     Stopwatch::start();
     $resp = new stdClass;
 
+    if($_SERVER['HTTP_HOST'] === 'mii.flashii.net') {
+        $resp->type = 'object';
+        $resp->content_type = new stdClass;
+        $resp->content_type->string = 'text/meow';
+        $resp->content_type->type = 'text';
+        $resp->content_type->subtype = 'meow';
+        $resp->title = 'Update your URLs: mii.flashii.net -> uiharu.flashii.net';
+        $resp->description = 'Update your URLs: mii.flashii.net -> uiharu.flashii.net';
+        $resp->site_name = 'Deprecation notice';
+        $resp->took = 35.1;
+        echo json_encode($resp);
+        return;
+    }
+
     if($reqMethod === 'POST') {
         $targetUrl = substr((string)file_get_contents('php://input'), 0, 1000);
     } else {