diff --git a/models/Asset.py b/models/Asset.py
index 0333495..79730a2 100644
--- a/models/Asset.py
+++ b/models/Asset.py
@@ -2,7 +2,7 @@ from datetime import datetime, UTC
 from enum import Enum
 from typing import Optional, Any, List
 
-from pydantic import BaseModel, computed_field
+from pydantic import BaseModel, computed_field, Field
 
 
 class AssetType(str, Enum):
@@ -19,7 +19,8 @@ class Asset(BaseModel):
     tg_doc_file_id: Optional[str] = None
     tg_photo_file_id: Optional[str] = None
     tags: List[str] = []
-    created_at: datetime = datetime.now(UTC)
+    created_at: datetime = Field(default_factory=lambda: datetime.now(UTC))
+    updated_at: datetime = Field(default_factory=lambda: datetime.now(UTC))
 
     # --- CALCULATED FIELD ---
     @computed_field
diff --git a/models/Generation.py b/models/Generation.py
index d875b32..e346115 100644
--- a/models/Generation.py
+++ b/models/Generation.py
@@ -2,7 +2,7 @@ from datetime import datetime, UTC
 from enum import Enum
 from typing import List, Optional
 
-from pydantic import BaseModel
+from pydantic import BaseModel, Field
 
 from models.Asset import Asset
 from models.enums import AspectRatios, Quality
@@ -23,5 +23,5 @@ class Generation(BaseModel):
     tech_prompt: Optional[str] = None
     assets_list: List[str]
     result: Optional[str] = None
-    created_at: datetime = datetime.now(UTC)
-    updated_at: datetime = datetime.now(UTC)
+    created_at: datetime = Field(default_factory=lambda: datetime.now(UTC))
+    updated_at: datetime = Field(default_factory=lambda: datetime.now(UTC))