diff --git a/docs/source/indices.rst b/docs/source/indices.rst
index 2e2007f3..28767e9f 100644
--- a/docs/source/indices.rst
+++ b/docs/source/indices.rst
@@ -9,4 +9,4 @@ API Documentation
 
 
 .. toctree::
-   :maxdepth:2
+   :maxdepth: 2