diff --git a/source/_static/style.css b/source/_static/style.css
index d7102b9..ec77640 100644
--- a/source/_static/style.css
+++ b/source/_static/style.css
@@ -10,3 +10,7 @@
 .wy-nav-content {
     box-shadow: 2px 0px 10px 0px rgba(0,0,0,0.6);
 }
+
+.wy-menu-vertical a:active {
+    background-color: #3d4059;
+}