diff --git a/src/index.ts b/src/index.ts
index 25f70b6..dddf598 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -58,6 +58,7 @@ fastify.get("/track/:id/download", async (req, r) => {
 	let { id } = (req.params as any);
 	let data = await backend.download(id);
 	r.header("content-disposition", `inline; filename="${data.filename}"`);
+	r.header("content-type", "application/octet-stream");
 	return data.stream;
 });