diff --git a/admin-manuals.yml b/admin-manuals.yml
index 5ed8d91..6b75401 100644
--- a/admin-manuals.yml
+++ b/admin-manuals.yml
@@ -7,7 +7,7 @@ markdown_extensions:
     - toc:
         separator: "_"
         permalink: "#"
-        slugify: !!python/name:pymdownx.slugs.uslugify
+        slugify: !!python/object/apply:pymdownx.slugs.slugify {kwds: {case: "lower", percent_encode: true}}
     - attr_list
     - admonition
     - sane_lists
diff --git a/user-manuals.yml b/user-manuals.yml
index 6768eeb..4e237ee 100644
--- a/user-manuals.yml
+++ b/user-manuals.yml
@@ -7,7 +7,7 @@ markdown_extensions:
     - toc:
         separator: "_"
         permalink: "#"
-        slugify: !!python/name:pymdownx.slugs.uslugify
+        slugify: !!python/object/apply:pymdownx.slugs.slugify {kwds: {case: "lower", percent_encode: true}}
     - attr_list
     - admonition
     - sane_lists