diff --git a/src/Casters/NullableCarbonCaster.php b/src/Casters/NullableCarbonCaster.php
deleted file mode 100644
index 3fab31d..0000000
--- a/src/Casters/NullableCarbonCaster.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-
-namespace Zoomyboy\LaravelNami\Casters;
-
-use Carbon\Carbon;
-use Spatie\DataTransferObject\Caster;
-
-class NullableCarbonCaster implements Caster
-{
-    public function cast(mixed $value): ?Carbon
-    {
-        return $value
-            ? Carbon::parse($value)
-            : null;
-    }
-}
diff --git a/src/Transformers/CarbonTransformer.php b/src/Transformers/CarbonTransformer.php
index f308d1e..395001d 100644
--- a/src/Transformers/CarbonTransformer.php
+++ b/src/Transformers/CarbonTransformer.php
@@ -8,7 +8,7 @@ use Spatie\LaravelData\Transformers\Transformer;
 class CarbonTransformer implements Transformer
 {
     public function __construct(
-        protected array|string|null $format = null
+        protected ?string $format = null
     ) {
     }