diff --git a/docs/source/index.rst b/docs/source/index.rst
index 84bf5844..fde821bb 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -1,4 +1,6 @@
-Solar Data Tools 
+:tocdepth: 3
+
+Solar Data Tools
 =================
 
 |PyPI release| |Anaconda Cloud release|