diff --git a/src/ControllerTrait.php b/src/ControllerTrait.php
index d47f216..8a80e1a 100644
--- a/src/ControllerTrait.php
+++ b/src/ControllerTrait.php
@@ -61,16 +61,19 @@ trait ControllerTrait {
         );
     }
 
+    public function renderError(string $errorCode, ?array $variables = null) : ResponseInterface
+    {
+        return static::renderHtml(
+            $this->renderRawView("lean/error/{$errorCode}", $variables ?? [])
+        );
+    }
+
     public function renderDocumentation(string $filename) : ResponseInterface
     {
         return $this->renderMarkdown( file_get_contents(getenv("PROJECT_PATH") . "/meta/doc/$filename.md") );
     }
 
     protected function redirect(string $url, int $code = 302, array $headers = []) {
-        if ($code === 302 && empty(array_change_key_case($headers, CASE_LOWER)['cache-control'])) {
-            $headers['cache-control'] = 'no-store';
-        }
-
         return new RedirectResponse($url, $code, $headers);
     }