diff --git a/packages/docusaurus-theme-classic/src/theme/DocSidebar/styles.module.css b/packages/docusaurus-theme-classic/src/theme/DocSidebar/styles.module.css
index f39d45fdbe..d8df189f13 100644
--- a/packages/docusaurus-theme-classic/src/theme/DocSidebar/styles.module.css
+++ b/packages/docusaurus-theme-classic/src/theme/DocSidebar/styles.module.css
@@ -13,6 +13,24 @@
     position: sticky;
     top: var(--ifm-navbar-height);
   }
+
+  .sidebar::-webkit-scrollbar {
+    width: 7px;
+  }
+
+  .sidebar::-webkit-scrollbar-track {
+    background: #f1f1f1;
+    border-radius: 10px;
+  }
+
+  .sidebar::-webkit-scrollbar-thumb {
+    background: #888;
+    border-radius: 10px;
+  }
+
+  .sidebar::-webkit-scrollbar-thumb:hover {
+    background: #555;
+  }
 }
 
 .sidebarMenuIcon {