diff --git a/vite.config.ts b/vite.config.ts
index e40adf1..6cd9e3a 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -3,12 +3,23 @@ import react from '@vitejs/plugin-react'
 
 export default defineConfig({
   plugins: [react()],
+
   define: {
     global: 'globalThis',
   },
+
+  // dev server (unchanged)
   server: {
     port: 3000,
   },
+
+  // production preview server (THIS FIXES YOUR ISSUE)
+  preview: {
+    host: '127.0.0.1',
+    port: 4173,
+    allowedHosts: ['counter.lnpulse.app'],
+  },
+
   build: {
     rollupOptions: {
       output: {
@@ -19,4 +30,4 @@ export default defineConfig({
       },
     },
   },
-}) 
\ No newline at end of file
+})