diff --git a/src/Models/Model.php b/src/Models/Model.php
index efdfcde..43cd2c4 100644
--- a/src/Models/Model.php
+++ b/src/Models/Model.php
@@ -282,11 +282,11 @@ public function save()
     /**
      * Specify data which should be serialized to JSON
      * @link http://php.net/manual/en/jsonserializable.jsonserialize.php
-     * @return mixed data which can be serialized by <b>json_encode</b>,
+     * @return array data which can be serialized by <b>json_encode</b>,
      * which is a value of any type other than a resource.
      * @since 5.4.0
      */
-    public function jsonSerialize()
+    public function jsonSerialize(): array
     {
         return $this->attributes;
     }