diff --git a/docs/index.rst b/docs/index.rst
index f75a420e939eb6be75d62cbc64efa768e13f701f..ce9c717a9c7075099be5a39d9d4eb03dccae6f49 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -4,7 +4,7 @@
 User and Developer Guides
 =========================
 .. toctree::
-    :maxdepth: 2
+    :maxdepth: 4
     :caption: Contents:
     :numbered: