diff --git a/app/Models/WebSocketDialog.php b/app/Models/WebSocketDialog.php
index 8efa24a66..58996344c 100644
--- a/app/Models/WebSocketDialog.php
+++ b/app/Models/WebSocketDialog.php
@@ -155,7 +155,7 @@ class WebSocketDialog extends AbstractModel
         if (isset($this->search_msg_id)) {
             // 最后消息 (搜索预览消息)
             $this->last_msg = WebSocketDialogMsg::whereDialogId($this->id)->find($this->search_msg_id);
-            $this->last_at = $this->last_msg?->created_at;
+            $this->last_at = $this->last_msg ? Carbon::parse($this->last_msg->created_at)->format('Y-m-d H:i:s') : null;
         } else {
             // 未读信息
             if (Base::judgeClientVersion("0.34.0")) {
diff --git a/resources/assets/js/functions/web.js b/resources/assets/js/functions/web.js
index 27f39198e..ad09b38db 100755
--- a/resources/assets/js/functions/web.js
+++ b/resources/assets/js/functions/web.js
@@ -102,8 +102,7 @@ import {MarkdownPreview} from "../store/markdown";
          */
         formatTime(date) {
             let now = $A.Time(),
-                time = $A.Date(date, true),
-                string = '';
+                time = $A.Date(date, true);
             if ($A.formatDate('Ymd', now) === $A.formatDate('Ymd', time)) {
                 return $A.formatDate('H:i', time)
             }
@@ -113,7 +112,7 @@ import {MarkdownPreview} from "../store/markdown";
             if ($A.formatDate('Y', now) === $A.formatDate('Y', time)) {
                 return $A.formatDate('m-d', time)
             }
-            return $A.formatDate('Y-m-d', time);
+            return $A.formatDate('Y-m-d', time) || '';
         },
 
         /**