diff --git a/app/api/bookings/[id]/contract-pdf/route.ts b/app/api/bookings/[id]/contract-pdf/route.ts
index fd86f80..ff59ba8 100644
--- a/app/api/bookings/[id]/contract-pdf/route.ts
+++ b/app/api/bookings/[id]/contract-pdf/route.ts
@@ -46,7 +46,7 @@ export async function GET(
       priceConfig,
     };
 
-    const signatureData = booking.contractSignedOnline ? booking.contractSignatureData : undefined;
+    const signatureData = booking.contractSignedOnline ? booking.contractSignatureData ?? undefined : undefined;
 
     const pdfBuffer = await generateContractFromTemplate(
       bookingWithPriceConfig,
@@ -55,7 +55,7 @@ export async function GET(
       signatureData
     );
 
-    return new NextResponse(pdfBuffer, {
+    return new NextResponse(new Uint8Array(pdfBuffer), {
       status: 200,
       headers: {
         'Content-Type': 'application/pdf',