diff --git a/lib/server.js b/lib/server.js
index a77630a..3664279 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -212,8 +212,8 @@ class Server {
             if (err.data) response.data = err.data;
             if (err.meta && typeof err.meta === 'object') {
                 if (typeof err.meta.headers === 'object') {
-                    for (let header in err.meta.headers) {
-                        response.meta.headers[header] = err.meta.headers[header];
+                    for (let [header, value] of Object.entries(err.meta.headers || {})) {
+                        response.header(header, value);
                     }
                 }
                 for (let key in err.meta) {