diff --git a/docs/doxygen/Doxyfile b/docs/doxygen/Doxyfile
index 400cc76..17f4f8a 100644
--- a/docs/doxygen/Doxyfile
+++ b/docs/doxygen/Doxyfile
@@ -44,7 +44,7 @@ HTML_COLORSTYLE        = TOGGLE
 HTML_DYNAMIC_MENUS     = NO
 HTML_COPY_CLIPBOARD    = NO
 HTML_PROJECT_COOKIE    = ALFI
-SITEMAP_URL            = alfi-lib.github.io/ALFI
+SITEMAP_URL            = https://alfi-lib.github.io/ALFI/
 DISABLE_INDEX          = NO
 GENERATE_TREEVIEW      = YES
 ENUM_VALUES_PER_LINE   = 1