diff --git a/frontend/src/components/layout/Sidebar.tsx b/frontend/src/components/layout/Sidebar.tsx
index e67ca3e..7f2a5d0 100644
--- a/frontend/src/components/layout/Sidebar.tsx
+++ b/frontend/src/components/layout/Sidebar.tsx
@@ -54,7 +54,7 @@ export function Sidebar({ onClose }: SidebarProps = {}) {
 
     return (
         <aside
-            className="flex w-64 shrink-0 flex-col border-r border-border bg-card"
+            className="flex h-full w-64 shrink-0 flex-col border-r border-border bg-card"
             data-testid="app-sidebar"
         >
             <div className="flex h-16 items-center justify-between border-b border-border px-6">