diff --git a/composer.json b/composer.json
index 605611a..7be55b8 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
         "laravel/pint": "^1.13",
         "pestphp/pest": "^2.0",
         "phpstan/phpstan": "^1.3",
-        "rector/rector": "^0.18.5"
+        "rector/rector": "^1"
     },
     "autoload": {
         "psr-4": {
diff --git a/src/Stat.php b/src/Stat.php
index 279b075..9d56c9b 100644
--- a/src/Stat.php
+++ b/src/Stat.php
@@ -42,7 +42,7 @@ public static function mean(array $data): int|float|null
             throw new InvalidDataInputException('The data must not be empty.');
         }
         // @phpstan-ignore-next-line
-        if (!empty(array_filter($data, 'is_string'))) {
+        if (array_filter($data, 'is_string') !== []) {
             throw new InvalidDataInputException('The data array contains a string.');
         }
         $sum = array_sum($data);