diff --git a/doc/index.rst b/doc/index.rst
index 2b90ad02..b5bcf294 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -11,7 +11,9 @@ The project is currently extended by several contributors to include additional
 .. toctree::
    :maxdepth: 2
    :numbered:
+
    installation
+   data_input
    feature_detection
    segmentation
    linking