diff --git a/README.md b/README.md
index 5c8038c..32511e5 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,6 @@
+> [!CAUTION]
+> ## Movido para <https://github.com/silbeckdevs/erede-php>
+> 
 # SDK PHP
 
 SDK de integração eRede
diff --git a/src/Rede/Transaction.php b/src/Rede/Transaction.php
index 8e8c5b2..9307a7f 100644
--- a/src/Rede/Transaction.php
+++ b/src/Rede/Transaction.php
@@ -377,7 +377,7 @@ public function jsonSerialize(): mixed
                 'origin' => $this->origin,
                 'distributorAffiliation' => $this->distributorAffiliation,
                 'storageCard' => $this->storageCard,
-                'urls' => $this->urls,
+                'urls' => $this->urls ?: null,
                 'iata' => $this->iata,
                 'additional' => $this->additional
             ],