diff --git a/styleguidist/styleguide.config.js b/styleguidist/styleguide.config.js
index 69a2dd0..f08f9c1 100644
--- a/styleguidist/styleguide.config.js
+++ b/styleguidist/styleguide.config.js
@@ -131,4 +131,11 @@ module.exports = {
 	 * @default "./styleguide"
 	 */
 	styleguideDir: "./frontend-docs",
+
+	/**
+	 * Defines if the table of contents sections will behave like an accordion.
+	 * @type {string} "collapse" | "expand"
+	 * @default "expand"
+	 */
+	tocMode: "collapse",
 }
\ No newline at end of file