diff --git a/src/Arr.php b/src/Arr.php
index 6b86df4..11b4588 100644
--- a/src/Arr.php
+++ b/src/Arr.php
@@ -144,7 +144,7 @@ public static function groupBy(array $items, $func): array
      *
      * @return array
      */
-    public function orderBy(array $items, $attr, $order): array
+    public static function orderBy(array $items, $attr, $order): array
     {
         $sortedItems = [];
         foreach ($items as $item) {