diff --git a/encar_scraper/api/routes/tasks.py b/encar_scraper/api/routes/tasks.py
index e5c1ab0..6d49a03 100644
--- a/encar_scraper/api/routes/tasks.py
+++ b/encar_scraper/api/routes/tasks.py
@@ -1,7 +1,7 @@
 # Роуты запуска задач синхронизации Encar и просмотра истории sync-runs.
 
 from fastapi import APIRouter, Depends, Query
-from pydantic import BaseModel
+from pydantic import BaseModel, Field
 from sqlalchemy import select, func
 
 from ..deps import get_persistence
@@ -25,7 +25,7 @@ class SyncListingRequest(BaseModel):
     year_to: int | None = None
     price_max: int | None = None
     lane: str = "encar"
-    limit: int | None = None
+    limit: int | None = Field(default=None, le=500_000)
 
 
 @router.post("/tasks/sync-vehicle")
diff --git a/encar_scraper/core/utils.py b/encar_scraper/core/utils.py
index 8c8cad5..df1ecaa 100644
--- a/encar_scraper/core/utils.py
+++ b/encar_scraper/core/utils.py
@@ -1,7 +1,7 @@
 import json
 import re
 from pathlib import Path
-from typing import Any, Callable, Iterable
+from typing import Any, Iterable
 
 
 def save_to_json(data: Any, filename: str | Path) -> None: