diff --git a/core/modules/system/templates/system-themes-page.html.twig b/core/modules/system/templates/system-themes-page.html.twig
index a72e95c..f427d3e 100644
--- a/core/modules/system/templates/system-themes-page.html.twig
+++ b/core/modules/system/templates/system-themes-page.html.twig
@@ -76,6 +76,7 @@
                   {% if theme.required_by %}
                     <div class="admin-requirements">{{ 'Required by: @module-list'|t({'@module-list': theme.required_by|safe_join(', ')}) }}</div>
                   {% endif %}
+                  </div>
                 </div>
               </div>
             </details>