diff --git a/files/mkdocs.yml b/files/mkdocs.yml
index 8f9e129..f2ac3ac 100644
--- a/files/mkdocs.yml
+++ b/files/mkdocs.yml
@@ -18,6 +18,8 @@ theme:
   font:
     text: 'Noto Sans'
     code: 'Ubuntu Mono'
+  features:
+    - navigation.expand
 extra:
   search:
     tokenizer: '[\s\-]+'