diff --git a/layouts/shortcodes/toc.html b/layouts/shortcodes/toc.html
index 3dddddc..808b84f 100644
--- a/layouts/shortcodes/toc.html
+++ b/layouts/shortcodes/toc.html
@@ -1 +1,4 @@
+<details>
+<summary>Toggle table of contents</summary>
 <h2>Table of Contents</h2>{{.Page.TableOfContents}}
+</details>