diff --git a/src/Potter/Bootstrap.php b/src/Potter/Bootstrap.php
index 13de618..e27b5a2 100644
--- a/src/Potter/Bootstrap.php
+++ b/src/Potter/Bootstrap.php
@@ -23,7 +23,7 @@ final class Bootstrap extends Controller
             headers: ['Content-Type' => ['text/css; charset=utf-8']]);
     }
     
-    static private function mapRoutes(Container $container, \Potter\Router\Router $router): void
+    static protected function mapRoutes(Container $container, \Potter\Router\Router $router): void
     {
         $router->map('GET', '/bootstrap.js', [self::class, 'getBootstrapScript']);
         $router->map('GET', '/bootstrap.css', [self::class, 'getBootstrapStyle']);