diff --git a/mkdocs.yml b/mkdocs.yml
index 4599cd280a0974e072136fd84883d5ed38231852..0d147055f0d5ff9ede7e7b8684393927d02a7514 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -211,7 +211,8 @@ markdown_extensions:
   - markdown.extensions.admonition:
   - pymdownx.arithmatex:
   - markdown.extensions.toc:
-      permalink: '(H)'
+      slugify: !!python/name:pymdownx.slugs.uslugify
+      permalink: î…—
   - pymdownx.snippets:
       base_path: docs.it4i/snippets