diff --git a/src/Resources/AnyResource.php b/src/Resources/AnyResource.php
index 32fc79da..e8bae679 100644
--- a/src/Resources/AnyResource.php
+++ b/src/Resources/AnyResource.php
@@ -14,7 +14,10 @@ public function __get(string $name): mixed
         return Arr::get($this->attributes, $name);
     }
 
-    public function fill(array|stdClass $attributes): void
+    /**
+     * @param array|stdClass $attributes
+     */
+    public function fill($attributes): void
     {
         $this->attributes = $attributes instanceof stdClass ? (array) $attributes : $attributes;
     }