diff --git a/src/Bid/Bid.php b/src/Bid/Bid.php
index 72c9981..8e087b7 100644
--- a/src/Bid/Bid.php
+++ b/src/Bid/Bid.php
@@ -79,6 +79,9 @@ class Bid
         return $this->fileAttachments;
     }
 
+    /**
+     * @param string[] $attachments
+     */
     public function setFileAttachments(array $attachments): void
     {
         $this->fileAttachments = $attachments;