diff --git a/models/deal.py b/models/deal.py
index d30283c..a5eab4f 100644
--- a/models/deal.py
+++ b/models/deal.py
@@ -1,7 +1,7 @@
 from enum import IntEnum, unique
 
 from sqlalchemy import Column, Integer, String, DateTime, ForeignKey, Boolean, Sequence
-from sqlalchemy.orm import relationship
+from sqlalchemy.orm import relationship, backref
 
 from models.base import BaseModel, metadata
 from models.utils import add_sequence_to_model
@@ -26,7 +26,7 @@ class Deal(BaseModel):
     current_status = Column(Integer, nullable=False, comment='Текущий статус')
 
     client_id = Column(Integer, ForeignKey('clients.id', ondelete='CASCADE'), nullable=False, comment='ID клиента')
-    client = relationship('Client', backref='deals')
+    client = relationship('Client', backref=backref('deals', cascade="all, delete-orphan"))
 
     status_history = relationship('DealStatusHistory', back_populates='deal', cascade="all, delete-orphan")