diff --git a/index.php b/index.php
index 3e03a20..0196cd2 100644
--- a/index.php
+++ b/index.php
@@ -20,7 +20,7 @@ if (!isLoggedIn()) {
 
 if($routerRequest["site_name"] == "sitemap.xml") {
     require "lib/sitemap.php";
-    echo generateSitemap();
+    generateSitemap();
     exit();
 }
 
diff --git a/lib/sitemap.php b/lib/sitemap.php
index 09fa79d..7523edb 100644
--- a/lib/sitemap.php
+++ b/lib/sitemap.php
@@ -2,7 +2,7 @@
 require_once "lib/account.php";
 
 
-function generateSitemap(): string {
+function generateSitemap(): void{
     global $routerConfig;
 
     $site_dirs = array_diff(scandir($routerConfig["page_dir"]), array('.', '..'));
@@ -52,5 +52,6 @@ function generateSitemap(): string {
 
     $sitemap .= '</urlset>' . PHP_EOL;
 
-    return $sitemap;
+    header('Content-type: application/xml');
+    echo $sitemap;
 }
\ No newline at end of file