diff --git a/src/Rede/Transaction.php b/src/Rede/Transaction.php
index 8e8c5b2..2a6b2d5 100644
--- a/src/Rede/Transaction.php
+++ b/src/Rede/Transaction.php
@@ -382,7 +382,7 @@ public function jsonSerialize(): mixed
                 'additional' => $this->additional
             ],
             function ($value) {
-                return !is_null($value);
+                return !empty($value);
             }
         );
     }