diff --git a/app.js b/app.js
index 5c5e44d..cbdeda6 100644
--- a/app.js
+++ b/app.js
@@ -240,7 +240,7 @@ app.get('/sitemap.xml', (req, res) => {
     let sitemap = `<?xml version="1.0" encoding="UTF-8"?>\n<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">\n`;
     urls.forEach(({ url, lastmod, changefreq, priority }) => {
         sitemap += `  <url>\n`;
-        sitemap += `    <loc>${hostname}${url}</loc>\n`;
+        sitemap += `    <loc>https://${hostname}${url}</loc>\n`;
         if (lastmod) {
             sitemap += `    <lastmod>${lastmod}</lastmod>\n`;
         }