diff --git a/mkdocs.yml b/mkdocs.yml
index 9393f72fdd2fb88d42e15eb5a1e0462ce10e3cf8..e1e4290a454fc198584bcf550acadfb333654b74 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -185,9 +185,8 @@ markdown_extensions:
   - codehilite
   - markdown.extensions.admonition:
   - pymdownx.arithmatex:
-  - markdown.extensions.toc:
+  - markdown.extensions.toc(permalink=true):
       slugify: !!python/name:pymdownx.slugs.uslugify
-      # permalink: 
   - pymdownx.snippets:
       base_path: docs.it4i/snippets