diff --git a/hugo.yaml b/hugo.yaml
index cac33d3e05de..efb4f86f01c7 100644
--- a/hugo.yaml
+++ b/hugo.yaml
@@ -21,6 +21,8 @@ imaging:
   anchor: smart
 
 markup:
+  tableOfContents:
+    endLevel: 5
   goldmark:
     extensions:
       linkify: false