diff --git a/src/Discord/Builders/MessageBuilder.php b/src/Discord/Builders/MessageBuilder.php
index d5c3f1a69..5764108b1 100644
--- a/src/Discord/Builders/MessageBuilder.php
+++ b/src/Discord/Builders/MessageBuilder.php
@@ -624,12 +624,12 @@ public function toMultipart(bool $payload = true): Multipart
     /**
      * {@inheritDoc}
      */
-    public function jsonSerialize(): array
+    public function jsonSerialize(): ?array
     {
         $empty = true;
 
         if (! empty($this->files)) {
-            $body = [];
+            $body = null;
             $empty = false;
         }