diff --git a/app/models/merchant_order.py b/app/models/merchant_order.py
index 922f00d..b2f7ec5 100644
--- a/app/models/merchant_order.py
+++ b/app/models/merchant_order.py
@@ -36,6 +36,8 @@ class MerchantOrderDB(Base):
     update_time = Column(DateTime(timezone=True), onupdate=func.now())
     transaction_id = Column(String(64))  # 微信支付交易号
     pay_time = Column(DateTime(timezone=True), nullable=True)
+    refund_transaction_id = Column(String(64))  # 微信退款交易号
+    refund_time = Column(DateTime(timezone=True), nullable=True)
 
 class MerchantOrderCreate(BaseModel):
     merchant_product_id: int