diff --git a/tcsocket/app/validation.py b/tcsocket/app/validation.py
index 18f9519..207986c 100644
--- a/tcsocket/app/validation.py
+++ b/tcsocket/app/validation.py
@@ -1,14 +1,17 @@
+import logging
 from datetime import datetime
 from enum import Enum, unique
 from secrets import token_hex
 from typing import Any, List, Optional
 
-from pydantic import BaseModel, EmailStr, NoneStr, constr, validator
+from pydantic import BaseModel, EmailStr, Field, NoneStr, constr, validator
 
 EXTRA_ATTR_TYPES = 'checkbox', 'text_short', 'text_extended', 'integer', 'stars', 'dropdown', 'datetime', 'date'
 
 MISSING = object()
 
+logger = logging.getLogger('socket')
+
 
 @unique
 class NameOptions(str, Enum):
@@ -136,15 +139,11 @@ class ContractorModel(BaseModel):
     last_name: constr(max_length=255) = None
     town: constr(max_length=63) = None
     country: constr(max_length=63) = None
-    last_updated: datetime = None
+    last_updated: datetime = Field(alias='release_timestamp')
     photo: NoneStr = None
     review_rating: float = None
     review_duration: int = None
 
-    @validator('last_updated', pre=True, always=True)
-    def set_last_updated(cls, v):
-        return v or datetime(2016, 1, 1)
-
     class LatitudeModel(BaseModel):
         latitude: Optional[float] = None
         longitude: Optional[float] = None