diff --git a/mkdocs.yml b/mkdocs.yml
index 32eed8e..174408f 100755
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -85,7 +85,7 @@ theme:
 
   features:
     #- navigation.instant
-    #- navigation.sections # prevents collapsible sections
+    - navigation.sections # prevents collapsible sections
     - navigation.indexes # section index pages
     - navigation.expand #expands sections by default
     - navigation.tabs