diff --git a/src/Controller/PostController.php b/src/Controller/PostController.php
index fe37aba..834391a 100644
--- a/src/Controller/PostController.php
+++ b/src/Controller/PostController.php
@@ -45,6 +45,9 @@ class PostController extends AbstractController
     public function post(Request $request, string $slug): Response
     {
         $post = $this->getDoctrine()->getRepository(Post::class)->findOneBy(array('slug' => $slug));
+        if (!$post) {
+            throw $this->createNotFoundException("Post not found");
+        }
         $form = $this->commentFormGenerator($post);
         $form->handleRequest($request);
         if ($form->isSubmitted() && $form->isValid()) {