diff --git a/yuthon_property_approval/models/property_current_approval.py b/yuthon_property_approval/models/property_current_approval.py
index 03557c2a3..81f01cf6c 100644
--- a/yuthon_property_approval/models/property_current_approval.py
+++ b/yuthon_property_approval/models/property_current_approval.py
@@ -7,6 +7,7 @@ from odoo import models, fields, api, exceptions, _
 class PropertyCurrentApproval(models.Model):
     _name = 'property.current.approval'
     _description = '租聘合同审批'
+    _inherit = ['soong.workflow.mixin', 'mail.thread.main.attachment', 'mail.activity.mixin']
 
     code = fields.Char(string="编号",
                        default=lambda self: self.env['ir.sequence'].next_by_code(