diff --git a/src/app.ts b/src/app.ts
index cbb4bd0..1304a53 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -1,5 +1,5 @@
 export const AppConfig = {
-  site: import.meta.env.SITE,
+  site: 'https://shrjamal.github.io/2048-3x3',
   site_name: '2048.club',
   title: '2048 3x3',
   description: 'Play 2048 3x3 Game online for free and record your best score',
diff --git a/src/pages/robots.txt.ts b/src/pages/robots.txt.ts
index b6b1dc9..e17cf0b 100644
--- a/src/pages/robots.txt.ts
+++ b/src/pages/robots.txt.ts
@@ -1,10 +1,12 @@
 import type { APIRoute } from 'astro'
+import { AppConfig } from '~/app'
 
 export const GET: APIRoute = async () => {
   return new Response(
     `
 	User-agent: *
 	Allow: /
+	Sitemap: ${AppConfig.site}/sitemap.xml
 	`,
     {
       headers: {
diff --git a/src/pages/sitemap.xml.ts b/src/pages/sitemap.xml.ts
index b649f7e..36678b3 100644
--- a/src/pages/sitemap.xml.ts
+++ b/src/pages/sitemap.xml.ts
@@ -1,6 +1,6 @@
 import type { APIRoute } from 'astro'
+import { AppConfig } from '~/app'
 
-const SITE = 'https://shrjamal.github.io/2048-3x3'
 export const GET: APIRoute = async () => {
   return new Response(
     `<?xml version="1.0" encoding="UTF-8"?>
@@ -29,7 +29,7 @@ function getXMLEntry({
 }) {
   return `
   <url>
-    <loc>${SITE}${path}</loc>
+    <loc>${AppConfig.site}${path}</loc>
     ${lastmod ? `<lastmod>${new Date(lastmod).toISOString()}</lastmod>` : ''}
     ${changeFreq ? `<changefreq>${changeFreq}</changefreq>` : ''}
     ${priority ? `<priority>${priority}</priority>` : ''}