more documentation
diff --git a/doc/index.rst b/doc/index.rst
index 9c84331..02577ab 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -36,9 +36,11 @@
 
 .. toctree::
     :maxdepth: 2
+    :numbered:
 
     intro
     installation
+    upgrading
     licence
     usage
     cli