diff --git a/src/Dot.php b/src/Dot.php
index 34cb4f6..115c340 100644
--- a/src/Dot.php
+++ b/src/Dot.php
@@ -600,6 +600,7 @@ public function getIterator()
      *
      * @return array
      */
+    #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
         return $this->items;