diff --git a/src/sse/routes.ts b/src/sse/routes.ts
index 18e6e9b..a42c9d2 100644
--- a/src/sse/routes.ts
+++ b/src/sse/routes.ts
@@ -27,7 +27,7 @@ export async function sseRoutes(
 			const sendEvent = (event: SseEvent) => {
 				reply.sse.send({
 					event: event.type,
-					data: event.data,
+					data: JSON.stringify(event.data),
 				});
 			};