diff --git a/Documentation/_static/css/gramine.css b/Documentation/_static/css/gramine.css
index 3e6922a2b7..cf886be892 100644
--- a/Documentation/_static/css/gramine.css
+++ b/Documentation/_static/css/gramine.css
@@ -1,3 +1,9 @@
 .rst-content dl:not(.docutils)>dt {
     font-family: SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",Courier,monospace;
 }
+
+/* adds scrollbar to sidenav */
+.wy-side-scroll {
+    width: auto;
+    overflow-y: auto;
+}