diff --git a/src/_templates/navigation.html b/src/_templates/navigation.html
index c7c5d4b6..f3113d01 100644
--- a/src/_templates/navigation.html
+++ b/src/_templates/navigation.html
@@ -1,4 +1,4 @@
-{{ toctree(includehidden=theme_sidebar_includehidden, collapse=theme_sidebar_collapse) }}
+{{ toctree(includehidden=theme_sidebar_includehidden, collapse=true) }}
{% if theme_extra_nav_links %}