diff --git a/src/Utils/JsonSerializer.php b/src/Utils/JsonSerializer.php
index 5d97af7b..a61fbbfd 100644
--- a/src/Utils/JsonSerializer.php
+++ b/src/Utils/JsonSerializer.php
@@ -16,8 +16,9 @@ public function __construct($input)
     /**
      * Encode this object to JSON
      */
+    #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
         return $this->args;
     }
-}
\ No newline at end of file
+}