diff --git a/doc/source/_templates/navigation.html b/doc/source/_templates/navigation.html
index b456c3d3..a9246921 100644
--- a/doc/source/_templates/navigation.html
+++ b/doc/source/_templates/navigation.html
@@ -1,14 +1,14 @@
-<!-- this is a hard override because alabaster does not have an option
-     to set the tocdepth in the navigation sidebar,
-     see https://github.com/bitprophet/alabaster/issues/89 -->
-
-<h3>{{ _('Navigation') }}</h3>
-{{ toctree(maxdepth=4, includehidden=theme_sidebar_includehidden, collapse=theme_sidebar_collapse) }}
-{% if theme_extra_nav_links %}
-<hr />
-<ul>
-    {% for text, uri in theme_extra_nav_links.items() %}
-    <li class="toctree-l1"><a href="{{ uri }}">{{ text }}</a></li>
-    {% endfor %}
-</ul>
-{% endif %}
+<!-- this is a hard override because alabaster does not have an option
+     to set the tocdepth in the navigation sidebar,
+     see https://github.com/bitprophet/alabaster/issues/89 -->
+
+<h3>{{ _('Navigation') }}</h3>
+{{ toctree(maxdepth=2, includehidden=theme_sidebar_includehidden, collapse=theme_sidebar_collapse) }}
+{% if theme_extra_nav_links %}
+<hr />
+<ul>
+    {% for text, uri in theme_extra_nav_links.items() %}
+    <li class="toctree-l1"><a href="{{ uri }}">{{ text }}</a></li>
+    {% endfor %}
+</ul>
+{% endif %}
\ No newline at end of file