diff --git a/src/css/custom.css b/src/css/custom.css
index b7892c0..e65f070 100644
--- a/src/css/custom.css
+++ b/src/css/custom.css
@@ -18,8 +18,9 @@
     --ifm-color-primary-lightest: #8cd47d;
 }
 
-.toggle_node_modules-\@docusaurus-theme-classic-lib-theme-ColorModeToggle-styles-module {
-    margin-left: 4px;
+/* Adds extra margin between last navbar item and the dark mode toggle. */
+.navbar__items--right .navbar__item:last-of-type {
+    margin-right: 4px;
 }
 
 .header-link-custom:before {