diff --git a/app/Http/Controllers/MobileApiController.php b/app/Http/Controllers/MobileApiController.php
index d42655b..c70cef2 100644
--- a/app/Http/Controllers/MobileApiController.php
+++ b/app/Http/Controllers/MobileApiController.php
@@ -244,11 +244,11 @@ class MobileApiController extends Controller
         $availableMarks = [];
 
         if ($class) {
-            $class_id = UniModel::model('pipi_auto_classes')->where('name', $class)->first()->id;
+            $class_id = UniModel::model('pipi_auto_classes')->where('name', $class)->first()?->id;
             $marks = $marks->where('class_id', $class_id);
         }
         if ($bodywork) {
-            $bodywork_id = UniModel::model('pipi_auto_bodywork')->where('name', $bodywork)->first()->id;
+            $bodywork_id = UniModel::model('pipi_auto_bodywork')->where('name', $bodywork)->first()?->id;
             $marks = $marks->where('bodywork_id', $bodywork_id);
         }