diff --git a/frontend/vite.config.js b/frontend/vite.config.js
index d246843..fe264af 100644
--- a/frontend/vite.config.js
+++ b/frontend/vite.config.js
@@ -8,4 +8,7 @@ export default defineConfig({
       '/api': 'http://localhost:5000',
     },
   },
+  preview: {
+    allowedHosts: ['cad.media-on.de', '.media-on.de'],
+  },
 });