diff --git a/app/controllers/ForumController.php b/app/controllers/ForumController.php
index 8c5696a..f7e8410 100755
--- a/app/controllers/ForumController.php
+++ b/app/controllers/ForumController.php
@@ -186,7 +186,7 @@ class ForumController extends ApplicationController
 
     public function markAllRead()
     {
-        $this->current_user->updateAttribute('last_forum_topic_read_at', time());
+        $this->current_user->updateAttribute('last_forum_topic_read_at', date('Y-m-d H:i:s'));
         $this->render('nothing');
     }
 }