diff --git a/app/src/Controllers/ZipController.php b/app/src/Controllers/ZipController.php
index a69e5d4..7c358fa 100644
--- a/app/src/Controllers/ZipController.php
+++ b/app/src/Controllers/ZipController.php
@@ -60,7 +60,7 @@ class ZipController
     {
         $path = $request->getQueryParams()['zip'];
 
-        if (! $this->container->get('zip_downloads') || ! realpath($path)) {
+        if (! $this->container->get('zip_downloads') || ! is_dir($path)) {
             return $response->withStatus(404, $this->translator->trans('error.file_not_found'));
         }