diff --git a/src/bk-user/bkuser/apis/web/tenant/serializers.py b/src/bk-user/bkuser/apis/web/tenant/serializers.py
index f4022bbda..218ae1fbd 100644
--- a/src/bk-user/bkuser/apis/web/tenant/serializers.py
+++ b/src/bk-user/bkuser/apis/web/tenant/serializers.py
@@ -100,7 +100,9 @@ def get_data_sources(self, obj: Tenant) -> List[Dict]:
 
 class TenantUpdateInputSLZ(serializers.Serializer):
     name = serializers.CharField(help_text="租户名称")
-    logo = serializers.CharField(help_text="租户 Logo", required=False, default=settings.DEFAULT_TENANT_LOGO)
+    logo = serializers.CharField(
+        help_text="租户 Logo", required=False, allow_blank=True, default=settings.DEFAULT_TENANT_LOGO
+    )
     manager_ids = serializers.ListField(child=serializers.CharField(), help_text="租户用户 ID 列表", allow_empty=False)
     feature_flags = TenantFeatureFlagSLZ(help_text="租户特性集")
 
diff --git a/src/bk-user/bkuser/biz/tenant.py b/src/bk-user/bkuser/biz/tenant.py
index 8e704dfbc..010bc6f6e 100644
--- a/src/bk-user/bkuser/biz/tenant.py
+++ b/src/bk-user/bkuser/biz/tenant.py
@@ -12,6 +12,7 @@
 from typing import Dict, List, Optional
 
 from django.db import transaction
+from django.utils.timezone import now
 from pydantic import BaseModel
 
 from bkuser.apps.data_source.models import (
@@ -307,7 +308,7 @@ def update_with_managers(tenant_id: str, tenant_info: TenantEditableBaseInfo, ma
 
         with transaction.atomic():
             # 更新基本信息
-            Tenant.objects.filter(id=tenant_id).update(**tenant_info.model_dump())
+            Tenant.objects.filter(id=tenant_id).update(updated_at=now(), **tenant_info.model_dump())
 
             if should_deleted_manager_ids:
                 TenantManager.objects.filter(