diff --git a/server/src/app.ts b/server/src/app.ts
index 0f885041..8c705616 100644
--- a/server/src/app.ts
+++ b/server/src/app.ts
@@ -83,6 +83,13 @@ export async function createApp(
 ) {
   const app = express();
 
+  // COOP/COEP headers required for SharedArrayBuffer (VAD voice activity detection)
+  app.use((_req, res, next) => {
+    res.setHeader("Cross-Origin-Opener-Policy", "same-origin");
+    res.setHeader("Cross-Origin-Embedder-Policy", "require-corp");
+    next();
+  });
+
   app.use(express.json({
     // Company import/export payloads can inline full portable packages.
     limit: "10mb",