diff --git a/build/engines.js b/build/engines.js
index 59ab8f6..b08a052 100644
--- a/build/engines.js
+++ b/build/engines.js
@@ -31,10 +31,11 @@ const markdownEngines = {
       },
     })
     .use(mAnchor, {
-      permalink: mAnchor.permalink.ariaHidden({
+      permalink: mAnchor.permalink.linkInsideHeader({
         class: 'header-link',
         symbol: '<img src="/images/svg/paragraph.svg">',
-        renderHref: slugify,
+        renderHref: (input) => '#' + slugify(decodeURIComponent(input)),
+        ariaHidden: true,
       }),
     })
     .use(require('./lib/markdown-raw-html'), { debug: false }),
diff --git a/build/lib/slugify.js b/build/lib/slugify.js
index c25be74..0f6ca72 100644
--- a/build/lib/slugify.js
+++ b/build/lib/slugify.js
@@ -1,5 +1,6 @@
 const slugs = require('slugify');
 
 module.exports = exports = function slugify (s) {
-  return slugs(s, { remove: /[*+~.,()'"!?:@/\\]/g }).toLowerCase();
+  const result = slugs(s, { remove: /[*+~.,()'"!?:@/\\]/g }).toLowerCase();
+  return result;
 };