diff --git a/src/server.ts b/src/server.ts
index cde8dbd..731c80d 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -31,6 +31,15 @@ fastify.post('/run', {
   const { code, language } = req.body;
   const jobId = generateId();
   const buffer = allocateBuffer(jobId, code, IMAGES.moshell);
+  reply.raw.writeHead(200, {
+    'Content-Type': 'text/event-stream',
+    Connection: 'keep-alive',
+    'Cache-Control': 'no-cache',
+    'Access-Control-Allow-Origin': process.env.ALLOW_ORIGIN || '*',
+  });
+  reply.raw.on('close', () => {
+    delete clients[jobId];
+  });
   sender.send(buffer).then(() => {
     reply.raw.write('event: connected\n');
     reply.raw.write(`data: ${jobId}\n`);