diff --git a/src/lib/components/table-of-contents.svelte b/src/lib/components/table-of-contents.svelte
index d966b38..dd05ffe 100644
--- a/src/lib/components/table-of-contents.svelte
+++ b/src/lib/components/table-of-contents.svelte
@@ -88,6 +88,7 @@
             background-color: var(--color-background-highlight);
             padding: 16px 0;
             border: var(--border-style) var(--border-dash-size) var(--color-highlight);
+        border-radius: var(--border-radius);
         }
 
         .toc-list {