diff --git a/app/api/mail/messages/[uid]/attachments/route.ts b/app/api/mail/messages/[uid]/attachments/route.ts
index 479fa30..d04c1e8 100644
--- a/app/api/mail/messages/[uid]/attachments/route.ts
+++ b/app/api/mail/messages/[uid]/attachments/route.ts
@@ -28,7 +28,7 @@ export async function GET(
       return NextResponse.json({ error: "Ek bulunamadı" }, { status: 404 });
     }
 
-    return new NextResponse(att.content, {
+    return new NextResponse(new Uint8Array(att.content), {
       headers: {
         "Content-Type": att.contentType,
         "Content-Disposition": `attachment; filename="${encodeURIComponent(filename)}"`,