diff --git a/sass/parts/_quick_navigation_buttons.scss b/sass/parts/_quick_navigation_buttons.scss
index 484cb72..5a948d7 100644
--- a/sass/parts/_quick_navigation_buttons.scss
+++ b/sass/parts/_quick_navigation_buttons.scss
@@ -55,6 +55,7 @@
         .toc-container {
             margin: 0;
             margin-top: $padding-vertical;
+            max-width: 80vw;
         }
 
         .toc-content {