diff --git a/src/Support/Carbon.php b/src/Support/Carbon.php
index <HASH>..<HASH> 100644
--- a/src/Support/Carbon.php
+++ b/src/Support/Carbon.php
@@ -52,7 +52,7 @@ class Carbon extends BaseCarbon implements JsonSerializable
      * @param  array  $array
      * @return static
      */
-    public static function __set_state($array)
+    public static function __set_state(array $array)
     {
         return static::instance(parent::__set_state($array));
     }
Merge with Laravel <I>