diff --git a/app/models.py b/app/models.py
index e25046c..d9a85d9 100644
--- a/app/models.py
+++ b/app/models.py
@@ -2,6 +2,7 @@ from __future__ import annotations
 
 from datetime import datetime
 from enum import Enum
+from typing import Optional
 
 from sqlalchemy import Boolean, DateTime, Enum as SAEnum, Float, ForeignKey, Integer, String, Text, UniqueConstraint
 from sqlalchemy.orm import Mapped, mapped_column, relationship
@@ -29,9 +30,9 @@ class Employee(Base):
 
     id: Mapped[int] = mapped_column(Integer, primary_key=True)
     name: Mapped[str] = mapped_column(String(200))
-    portal_user_id: Mapped[str | None] = mapped_column(String(100), unique=True, index=True, nullable=True)
-    tg_chat_id: Mapped[str | None] = mapped_column(String(64), unique=True, nullable=True)
-    tg_username: Mapped[str | None] = mapped_column(String(200), nullable=True)
+    portal_user_id: Mapped[Optional[str]] = mapped_column(String(100), unique=True, index=True, nullable=True)
+    tg_chat_id: Mapped[Optional[str]] = mapped_column(String(64), unique=True, nullable=True)
+    tg_username: Mapped[Optional[str]] = mapped_column(String(200), nullable=True)
     created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
 
     projects: Mapped[list["Project"]] = relationship(back_populates="owner")
@@ -45,21 +46,21 @@ class Project(Base):
     id: Mapped[int] = mapped_column(Integer, primary_key=True)
     title: Mapped[str] = mapped_column(String(300))
     deal_type: Mapped[DealType] = mapped_column(SAEnum(DealType))
-    our_price: Mapped[float | None] = mapped_column(Float, nullable=True)
-    notes: Mapped[str | None] = mapped_column(Text, nullable=True)
+    our_price: Mapped[Optional[float]] = mapped_column(Float, nullable=True)
+    notes: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
 
     # Опциональные параметры — используются для подсказок похожих объявлений
-    dld_permit: Mapped[str | None] = mapped_column(String(100), index=True, nullable=True)
-    building: Mapped[str | None] = mapped_column(String(300), nullable=True)
-    bedrooms: Mapped[int | None] = mapped_column(Integer, nullable=True)
-    size_sqft: Mapped[float | None] = mapped_column(Float, nullable=True)
-    our_url: Mapped[str | None] = mapped_column(Text, nullable=True)
+    dld_permit: Mapped[Optional[str]] = mapped_column(String(100), index=True, nullable=True)
+    building: Mapped[Optional[str]] = mapped_column(String(300), nullable=True)
+    bedrooms: Mapped[Optional[int]] = mapped_column(Integer, nullable=True)
+    size_sqft: Mapped[Optional[float]] = mapped_column(Float, nullable=True)
+    our_url: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
 
     owner_id: Mapped[int] = mapped_column(ForeignKey("employees.id"))
     owner: Mapped[Employee] = relationship(back_populates="projects")
 
     created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
-    last_checked_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
+    last_checked_at: Mapped[Optional[datetime]] = mapped_column(DateTime, nullable=True)
 
     listings: Mapped[list["CompetitorListing"]] = relationship(
         back_populates="project", cascade="all, delete-orphan"
@@ -79,15 +80,15 @@ class CompetitorListing(Base):
     source: Mapped[Source] = mapped_column(SAEnum(Source))
     external_id: Mapped[str] = mapped_column(String(100))  # ID на стороне PF/Bayut
     url: Mapped[str] = mapped_column(Text)
-    title: Mapped[str | None] = mapped_column(String(500), nullable=True)
-    agent_name: Mapped[str | None] = mapped_column(String(300), nullable=True)
-    agency_name: Mapped[str | None] = mapped_column(String(300), nullable=True)
-    permit_number: Mapped[str | None] = mapped_column(String(100), nullable=True)
+    title: Mapped[Optional[str]] = mapped_column(String(500), nullable=True)
+    agent_name: Mapped[Optional[str]] = mapped_column(String(300), nullable=True)
+    agency_name: Mapped[Optional[str]] = mapped_column(String(300), nullable=True)
+    permit_number: Mapped[Optional[str]] = mapped_column(String(100), nullable=True)
     auto_discovered: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
     permit_missing_checks: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
 
-    current_price: Mapped[float | None] = mapped_column(Float, nullable=True)
-    currency: Mapped[str | None] = mapped_column(String(10), nullable=True, default="AED")
+    current_price: Mapped[Optional[float]] = mapped_column(Float, nullable=True)
+    currency: Mapped[Optional[str]] = mapped_column(String(10), nullable=True, default="AED")
     status: Mapped[ListingStatus] = mapped_column(SAEnum(ListingStatus), default=ListingStatus.ACTIVE)
 
     first_seen_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
@@ -105,5 +106,5 @@ class PriceHistory(Base):
     listing_id: Mapped[int] = mapped_column(ForeignKey("competitor_listings.id"))
     listing: Mapped[CompetitorListing] = relationship(back_populates="price_history")
 
-    price: Mapped[float | None] = mapped_column(Float, nullable=True)
+    price: Mapped[Optional[float]] = mapped_column(Float, nullable=True)
     recorded_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)