diff --git a/docs/index.rst b/docs/index.rst
index e2277f6..5cc3972 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -1026,9 +1026,17 @@ parsedmarc.elastic
 .. automodule:: parsedmarc.elastic
    :members:
 
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
 .. automodule:: parsedmarc.splunk
    :members:
 
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
 .. automodule:: parsedmarc.utils
    :members:
 
@@ -1036,6 +1044,10 @@ parsedmarc.elastic
    :maxdepth: 2
    :caption: Contents:
 
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
 Indices and tables
 ==================