diff --git a/core/config.py b/core/config.py
index 6d3bbc7..db17f44 100644
--- a/core/config.py
+++ b/core/config.py
@@ -7,15 +7,11 @@ from typing import (
 )
 
 import dotenv
-from pydantic import (
-    AnyUrl,
-    BaseModel,
-    Field,
-    validator,
-)
+from pydantic import AnyUrl, BaseModel, Field
 
 from utils.const import PROJECT_ROOT
 from utils.models.base import Settings
+from utils.typedefs import NaturalNumber
 
 __all__ = ["BotConfig", "config", "JoinGroups"]
 
@@ -67,15 +63,9 @@ class LoggerConfig(Settings):
     render_keywords: List[str] = ["BOT"]
     locals_max_length: int = 10
     locals_max_string: int = 80
-    locals_max_depth: Optional[int] = None
+    locals_max_depth: Optional[NaturalNumber] = None
     filtered_names: List[str] = ["uvicorn"]
 
-    @validator("locals_max_depth", pre=True, check_fields=False)
-    def locals_max_depth_validator(cls, value) -> Optional[int]:  # pylint: disable=R0201
-        if int(value) <= 0:
-            return None
-        return value
-
     class Config(Settings.Config):
         env_prefix = "logger_"
 
diff --git a/utils/typedefs.py b/utils/typedefs.py
index 4b0bed6..f8ff02e 100644
--- a/utils/typedefs.py
+++ b/utils/typedefs.py
@@ -4,6 +4,7 @@ from types import TracebackType
 from typing import Any, Callable, Dict, Optional, Tuple, Type, Union
 
 from httpx import URL
+from pydantic import ConstrainedInt
 
 __all__ = [
     "StrOrPath",
@@ -14,6 +15,7 @@ __all__ = [
     "JSONDict",
     "JSONType",
     "LogFilterType",
+    "NaturalNumber",
 ]
 
 StrOrPath = Union[str, Path]
@@ -26,3 +28,7 @@ JSONDict = Dict[str, Any]
 JSONType = Union[JSONDict, list]
 
 LogFilterType = Union[Filter, Callable[[LogRecord], int]]
+
+
+class NaturalNumber(ConstrainedInt):
+    ge = 0