diff --git a/sitemap.txt b/sitemap.txt
index de05673..6e42fb8 100644
--- a/sitemap.txt
+++ b/sitemap.txt
@@ -185,6 +185,8 @@ https://boof.eu.org/tools/encoder/
 https://boof.eu.org/tools/encoder/index.js
 https://boof.eu.org/tools/encoder/style.css
 https://boof.eu.org/tools/percentage-calc/
+https://boof.eu.org/tools/prime numbers/
+https://boof.eu.org/tools/prime numbers/index.js
 https://boof.eu.org/Games/2048/js/animframe_polyfill.js
 https://boof.eu.org/Games/2048/js/application.js
 https://boof.eu.org/Games/2048/js/bind_polyfill.js
diff --git a/sitemap.xml b/sitemap.xml
index f36d219..d935aec 100644
--- a/sitemap.xml
+++ b/sitemap.xml
@@ -249,6 +249,10 @@
 <lastmod>2023-02-27T13:52:21+01:00</lastmod>
 </url>
 <url>
+<loc>https://boof.eu.org/tools/prime numbers/</loc>
+<lastmod>2023-04-27T10:06:13+02:00</lastmod>
+</url>
+<url>
 <loc>https://boof.eu.org/Games/Flash/Interactive buddy/</loc>
 <lastmod>2022-11-10T09:37:05+01:00</lastmod>
 </url>