diff --git a/index.html b/index.html
index 5167881..c432f62 100644
--- a/index.html
+++ b/index.html
@@ -2521,7 +2521,7 @@ function renderListView() {
                     <div class="list-card-footer">
                         ${urlDisplay
                             ? `<a class="list-card-url" href="${node.url}" target="_blank"
-                                  rel="noopener" onclick="event.stopPropagation()">${urlDisplay}</a>`
+                                  rel="noopener noreferrer" onclick="event.stopPropagation()">${urlDisplay}</a>`
                             : '<span></span>'}
                         <span class="list-card-conns">${connCount} 接続</span>
                     </div>