Fix routes

app/Api/V2/Controllers/Model/Account/ShowController.php

@@ -39,6 +39,8 @@ class ShowController extends Controller
     public function show(Account $account): JsonResponse
     {
         $transformer = new AccountTransformer;
-        return response()->json($this->jsonApiObject('accounts', $account, $transformer));
+        return response()
+            ->api($this->jsonApiObject('accounts', $account, $transformer))
+            ->header('Content-Type', self::CONTENT_TYPE);
     }
 }

app/Api/V2/Controllers/NetWorthController.php

@@ -42,6 +42,7 @@ class NetWorthController extends Controller
      */
     public function __construct()
     {
+        parent::__construct();
         $this->middleware(
             function ($request, $next) {
                 $this->repository = app(AccountRepositoryInterface::class);
@@ -52,13 +53,17 @@ class NetWorthController extends Controller
         );
     }
 
+    /**
+     * @param SingleDateRequest $request
+     * @return JsonResponse
+     */
     public function get(SingleDateRequest $request): JsonResponse
     {
         $date      = $request->getDate();
         $result    = $this->netWorth->sumNetWorthByCurrency($date);
         $converted = $this->cerSum($result);
 
-        return response()->json($converted);
+        return response()->api($converted);
     }
 
 }

app/Api/V2/Request/Generic/SingleDateRequest.php

@@ -56,7 +56,7 @@ class SingleDateRequest extends FormRequest
     public function rules(): array
     {
         return [
-            'date' => 'required|date',
+            'date' => 'required|date|after:1900-01-01|before:2099-12-31',
         ];
     }
 }