diff --git a/instance/model.py b/instance/model.py
index 409c3e9..05ca613 100644
--- a/instance/model.py
+++ b/instance/model.py
@@ -26,7 +26,7 @@ class User(Base):
     telegram_id = Column(String, unique=True, nullable=False)
     username = Column(String)
     balance = Column(Numeric(10, 2), default=0.0)
-    referrer_id = Column(String, ForeignKey('users.id'), nullable=True)  # Кто пригласил
+    referrer_id = Column(UUID(as_uuid=True), ForeignKey('users.id'), nullable=True)  # Кто пригласил
     created_at = Column(DateTime, default=datetime.utcnow)
     updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)