diff --git a/pelican_theme_teckids/pelicanconf.py b/pelican_theme_teckids/pelicanconf.py
index eaa3782dbe4aef4702d968f8f3c978568bc3c49f..a5395132952d7859aa038dd03e7f145e7bbff9d0 100644
--- a/pelican_theme_teckids/pelicanconf.py
+++ b/pelican_theme_teckids/pelicanconf.py
@@ -83,5 +83,5 @@ LICENCETEXTS = {
 
 
 SITEMAP = {
-    "format": "txt",
+    "format": "xml",
 }