diff --git a/src/Mappers/PaginatorTypeMapper.php b/src/Mappers/PaginatorTypeMapper.php
index e110a77..b242c5f 100644
--- a/src/Mappers/PaginatorTypeMapper.php
+++ b/src/Mappers/PaginatorTypeMapper.php
@@ -104,54 +104,54 @@ private function getObjectType(bool $countable, OutputType $subType): MutableInt
                         'firstItem' => [
                             'type' => Type::int(),
                             'description' => 'Get the "index" of the first item being paginated.',
-                            'resolve' => static function (Paginator $root): int {
+                            'resolve' => static function (Paginator $root): ?int {
                                 return $root->firstItem();
                             },
                         ],
                         'lastItem' => [
                             'type' => Type::int(),
                             'description' => 'Get the "index" of the last item being paginated.',
-                            'resolve' => static function (Paginator $root): int {
+                            'resolve' => static function (Paginator $root): ?int {
                                 return $root->lastItem();
                             },
                         ],
                         'hasMorePages' => [
-                            'type' => Type::boolean(),
+                            'type' => Type::nonNull(Type::boolean()),
                             'description' => 'Determine if there are more items in the data source.',
                             'resolve' => static function (Paginator $root): bool {
                                 return $root->hasMorePages();
                             },
                         ],
                         'perPage' => [
-                            'type' => Type::int(),
+                            'type' => Type::nonNull(Type::int()),
                             'description' => 'Get the number of items shown per page.',
                             'resolve' => static function (Paginator $root): int {
                                 return $root->perPage();
                             },
                         ],
                         'hasPages' => [
-                            'type' => Type::boolean(),
+                            'type' => Type::nonNull(Type::boolean()),
                             'description' => 'Determine if there are enough items to split into multiple pages.',
                             'resolve' => static function (Paginator $root): bool {
                                 return $root->hasPages();
                             },
                         ],
                         'currentPage' => [
-                            'type' => Type::int(),
+                            'type' => Type::nonNull(Type::int()),
                             'description' => 'Determine the current page being paginated.',
                             'resolve' => static function (Paginator $root): int {
                                 return $root->currentPage();
                             },
                         ],
                         'isEmpty' => [
-                            'type' => Type::boolean(),
+                            'type' => Type::nonNull(Type::boolean()),
                             'description' => 'Determine if the list of items is empty or not.',
                             'resolve' => static function (Paginator $root): bool {
                                 return $root->isEmpty();
                             },
                         ],
                         'isNotEmpty' => [
-                            'type' => Type::boolean(),
+                            'type' => Type::nonNull(Type::boolean()),
                             'description' => 'Determine if the list of items is not empty.',
                             'resolve' => static function (Paginator $root): bool {
                                 return $root->isNotEmpty();
@@ -161,13 +161,13 @@ private function getObjectType(bool $countable, OutputType $subType): MutableInt
 
                     if ($countable) {
                         $fields['totalCount'] = [
-                            'type' => Type::int(),
+                            'type' => Type::nonNull(Type::int()),
                             'description' => 'The total count of items.',
                             'resolve' => static function (LengthAwarePaginator $root): int {
                                 return $root->total();
                             }];
                         $fields['lastPage'] = [
-                            'type' => Type::int(),
+                            'type' => Type::nonNull(Type::int()),
                             'description' => 'Get the page number of the last available page.',
                             'resolve' => static function (LengthAwarePaginator $root): int {
                                 return $root->lastPage();