diff --git a/public/admin.php b/public/admin.php
index 4435b18..2b7ea24 100644
--- a/public/admin.php
+++ b/public/admin.php
@@ -12,6 +12,12 @@ header('X-XSS-Protection: 1; mode=block');
 header('Referrer-Policy: strict-origin-when-cross-origin');
 header_remove('X-Powered-By');
 
+// Load Composer autoloader for CommonMark
+$autoloader = __DIR__ . '/../vendor/autoload.php';
+if (file_exists($autoloader)) {
+    require_once $autoloader;
+}
+
 // Load admin components
 $appConfig = require __DIR__ . '/../admin/config/app.php';
 require_once __DIR__ . '/../admin/src/AdminAuth.php';
@@ -1387,11 +1393,18 @@ function handleGuide(AdminAuth $auth, array $config): void
 
     // Parse markdown using CommonMark if available
     $content = '';
-    if (class_exists('League\CommonMark\CommonMarkConverter')) {
-        $converter = new League\CommonMark\CommonMarkConverter([
+    if (class_exists('League\CommonMark\MarkdownConverter')) {
+        $config = [
             'html_input' => 'allow',
             'allow_unsafe_links' => false,
-        ]);
+            'max_nesting_level' => 100,
+        ];
+        $environment = new \League\CommonMark\Environment\Environment($config);
+        $environment->addExtension(new \League\CommonMark\Extension\CommonMark\CommonMarkCoreExtension());
+        $environment->addExtension(new \League\CommonMark\Extension\Table\TableExtension());
+        $environment->addExtension(new \League\CommonMark\Extension\Strikethrough\StrikethroughExtension());
+        $environment->addExtension(new \League\CommonMark\Extension\TaskList\TaskListExtension());
+        $converter = new \League\CommonMark\MarkdownConverter($environment);
         $content = $converter->convert($rawContent)->getContent();
     } else {
         $content = '<pre>' . htmlspecialchars($rawContent) . '</pre>';