diff --git a/website/.eleventy.js b/website/.eleventy.js
index 74597cb..7938c9d 100644
--- a/website/.eleventy.js
+++ b/website/.eleventy.js
@@ -71,6 +71,14 @@ function getManualPageOrder(lang, slug) {
     return index >= 0 ? index : 999;
 }
 
+function githubCompatibleSlug(value) {
+    return (value || "")
+        .trim()
+        .toLowerCase()
+        .replace(/[^\p{L}\p{N}\s_-]/gu, "")
+        .replace(/\s+/g, "-");
+}
+
 function rewriteManualLinks(content, lang) {
     return (content || "")
 
@@ -157,6 +165,7 @@ module.exports = function (eleventyConfig) {
         linkify: true,
         typographer: true
     }).use(markdownItAnchor, {
+        slugify: githubCompatibleSlug,
         permalink: markdownItAnchor.permalink.headerLink()
     });
 
diff --git a/website/src/_layouts/base.njk b/website/src/_layouts/base.njk
index 8c77dc4..afbdedd 100644
--- a/website/src/_layouts/base.njk
+++ b/website/src/_layouts/base.njk
@@ -6,7 +6,6 @@
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta name="theme-color" content="#08110b">
   <link rel="icon" href="/assets/favicon.svg" type="image/svg+xml">
-  <link rel="icon" href="/assets/favicon.svg" type="image/svg+xml">
   <meta name="description" content="{{ description or 'KST4Contest connects ON4KST chat, candidate selection, sked planning and station software for VHF, UHF and SHF contest operation.' }}">
   <link rel="canonical" href="https://kst4contest.hamradioonline.de{{ page.url }}">