diff --git a/server/routes.js b/server/routes.js
index cdced3be9..5881895b3 100644
--- a/server/routes.js
+++ b/server/routes.js
@@ -22,6 +22,7 @@ const router = new Router();
 if (process.env.NODE_ENV === 'production') {
   router.get('/service-worker.js', async (ctx) => {
     ctx.set('Content-Type', 'application/javascript');
+    ctx.set('Cache-Control', `max-age=${30}`);
     const stats = await sendfile(ctx, path.join(__dirname, './static/service-worker.js'));
     if (!ctx.status) ctx.throw(httpErrors.NotFound());
   });