diff --git a/addons/website/static/src/snippets/s_table_of_content/000.js b/addons/website/static/src/snippets/s_table_of_content/000.js
index 03083afa004..2b7b0ade23a 100644
--- a/addons/website/static/src/snippets/s_table_of_content/000.js
+++ b/addons/website/static/src/snippets/s_table_of_content/000.js
@@ -28,7 +28,7 @@ const TableOfContent = publicWidget.Widget.extend({
             extraMenuUpdateCallbacks.splice(indexCallback, 1);
         }
         this.$el.css('top', '');
-        this.$el.find('.s_table_of_content_navbar').css('top', '');
+        this.$el.find('.s_table_of_content_navbar').css({top: '', maxHeight: ''});
         this._super(...arguments);
     },
 
@@ -51,6 +51,7 @@ const TableOfContent = publicWidget.Widget.extend({
         this.$el.css('top', isHorizontalNavbar ? position : '');
         this.$el.find('.s_table_of_content_navbar').css('top', isHorizontalNavbar ? '' : position + 20);
         position += isHorizontalNavbar ? this.$el.outerHeight() : 0;
+        this.$el.find('.s_table_of_content_navbar').css('maxHeight', isHorizontalNavbar ? '' : `calc(100vh - ${position + 40}px)`);
         if (this.previousPosition !== position) {
             new ScrollSpy(this.$scrollingElement, {
                 target: this.$el.find('.s_table_of_content_navbar'),
diff --git a/addons/website/static/src/snippets/s_table_of_content/000.scss b/addons/website/static/src/snippets/s_table_of_content/000.scss
index 4f4b83377f6..4b93cc0da7b 100644
--- a/addons/website/static/src/snippets/s_table_of_content/000.scss
+++ b/addons/website/static/src/snippets/s_table_of_content/000.scss
@@ -4,6 +4,9 @@
             &.s_table_of_content_horizontal_navbar, &.s_table_of_content_vertical_navbar .s_table_of_content_navbar {
                 @include o-position-sticky($top: 0px);
             }
+            &.s_table_of_content_vertical_navbar .s_table_of_content_navbar {
+                overflow: auto;
+            }
         }
         &:not(.s_table_of_content_navbar_sticky) {
             &, .s_table_of_content_navbar {