diff --git a/src/routes/api/devices/[devEui]/pdf/+server.ts b/src/routes/api/devices/[devEui]/pdf/+server.ts
index 7e6d4bf9..69e7fbc1 100644
--- a/src/routes/api/devices/[devEui]/pdf/+server.ts
+++ b/src/routes/api/devices/[devEui]/pdf/+server.ts
@@ -519,7 +519,7 @@ export const GET: RequestHandler = async ({ params, url, locals: { supabase } })
 						status: 200,
 						headers: {
 							'Content-Type': 'application/pdf',
-							'Content-Disposition': `attachment; filename=device-${devEui}-report-${startDateParam}-to-${endDateParam}.pdf`,
+							'Content-Disposition': `attachment; filename*=UTF-8''device-${devEui}-report-${startDateParam}-to-${endDateParam}.pdf`,
 							'Content-Length': pdfBuffer.length.toString(),
 							'Access-Control-Allow-Origin': '*',
 							'Access-Control-Allow-Methods': 'GET',