diff --git a/mkdocs.yml b/mkdocs.yml
index 1a04136..2d314a6 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -6,7 +6,7 @@ markdown_extensions:
     - toc:
           separator: "_"
           permalink: "#"
-          slugify: !!python/name:pymdownx.slugs.slugify
+          slugify: !!python/object/apply:pymdownx.slugs.slugify {kwds: {case: "lower", percent_encode: true}}
     - attr_list
     - admonition
     - sane_lists