diff --git a/src/Eccube/Resource/template/admin/Store/plugin_table.twig b/src/Eccube/Resource/template/admin/Store/plugin_table.twig
index ddbd3812599..ceeaa8bd23c 100644
--- a/src/Eccube/Resource/template/admin/Store/plugin_table.twig
+++ b/src/Eccube/Resource/template/admin/Store/plugin_table.twig
@@ -132,7 +132,7 @@ $(function() {
             <div class="modal-header">
                 <h5 class="modal-title fw-bold">
                     {{ 'admin.store.plugin.popup.delete.confirm.title'|trans }}</h5>
-                <button class="close" type="button"
+                <button class="btn-close" type="button"
                         data-bs-dismiss="modal"
                         aria-label="Close">
                 </button>