diff --git a/composer.json b/composer.json
index b086711..51cb5ec 100644
--- a/composer.json
+++ b/composer.json
@@ -14,8 +14,8 @@
     ],
     "require": {
         "php": ">=7.4",
-        "laravel/framework": "^8.0|^9.0|^10.0|^11.0",
-        "laravel/nova": "^4.0",
+        "laravel/framework": "^8.0|^9.0|^10.0|^11.0|^12.0",
+        "laravel/nova": "^5.0",
         "spatie/laravel-medialibrary": "^8.0|^9.0|^10.0|^11.0"
     },
     "autoload": {
diff --git a/src/Fields/HandlesCustomPropertiesTrait.php b/src/Fields/HandlesCustomPropertiesTrait.php
index e0234fe..fa0087b 100644
--- a/src/Fields/HandlesCustomPropertiesTrait.php
+++ b/src/Fields/HandlesCustomPropertiesTrait.php
@@ -82,9 +82,9 @@ private function fillMediaCustomPropertiesFromRequest(NovaRequest $request, Medi
             // If we are dealing with nested resources or multiple panels, custom property fields are prefixed.
             $key = str_replace($collection, '__media-custom-properties__.'.$collection, $requestAttribute);
             $targetAttribute = "custom_properties->{$field->attribute}";
-            $requestAttribute = "{$key}.{$index}.{$field->attribute}";
+            $targetRequestAttribute = "{$key}.{$index}.{$field->attribute}";
 
-            $field->fillInto($request, $media, $targetAttribute, $requestAttribute);
+            $field->fillInto($request, $media, $targetAttribute, $targetRequestAttribute);
         }
 
         $media->save();
diff --git a/src/Fields/Media.php b/src/Fields/Media.php
index 8c6443e..17008b6 100644
--- a/src/Fields/Media.php
+++ b/src/Fields/Media.php
@@ -287,7 +287,7 @@ private function removeDeletedMedia($data, Collection $medias): Collection
      * @param HasMedia|InteractsWithMedia $resource
      * @param null $attribute
      */
-    public function resolve($resource, $attribute = null): void
+    public function resolve($resource, ?string $attribute = null): void
     {
         $collectionName = $attribute ?? $this->attribute;