diff --git a/mkdocs.yml b/mkdocs.yml
index 02518baf185..acefd231ee1 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -50,8 +50,8 @@ markdown_extensions:
   - footnotes
   - tables
   - toc:
-    permalink: true
-    toc_depth: 4
+        permalink: true
+        toc_depth: 4
 
 # Page tree
 nav: