diff --git a/src/shared/modules/offer/default-offer.service.ts b/src/shared/modules/offer/default-offer.service.ts
index be35037..a79709b 100644
--- a/src/shared/modules/offer/default-offer.service.ts
+++ b/src/shared/modules/offer/default-offer.service.ts
@@ -107,8 +107,7 @@ export class DefaultOfferService implements OfferService {
 
   // TODO: проверка на существование документа - предложения
   public async exists(documentId: string): Promise<boolean> {
-    return (await this.offerModel
-      .exists({_id: documentId})) !== null;
+    return this.offerModel.exists({_id: documentId}).then(r => !!r);
   }
 
 
diff --git a/src/shared/modules/offer/offer.constant.ts b/src/shared/modules/offer/offer.constant.ts
index e02f6cb..c49f4a9 100644
--- a/src/shared/modules/offer/offer.constant.ts
+++ b/src/shared/modules/offer/offer.constant.ts
@@ -1,2 +1,3 @@
 export const DEFAULT_OFFER_COUNT = 60;
 export const DEFAULT_PREMIUM_OFFER_COUNT = 3;
+export const MAX_OFFER_COUNT = 300;
diff --git a/src/shared/modules/offer/offer.controller.ts b/src/shared/modules/offer/offer.controller.ts
index 4dd18c8..61fdeb3 100644
--- a/src/shared/modules/offer/offer.controller.ts
+++ b/src/shared/modules/offer/offer.controller.ts
@@ -12,7 +12,7 @@ import { fillDTO } from '../../helpers/common.js';
 import { FullOfferRdo } from './rdo/full-offer.rdo.js';
 import { StatusCodes } from 'http-status-codes';
 import { UpdateOfferDto } from './dto/update-offer.dto.js';
-import { DEFAULT_OFFER_COUNT } from './offer.constant.js';
+import { DEFAULT_OFFER_COUNT, MAX_OFFER_COUNT } from './offer.constant.js';
 import { IdOfferRdo } from './rdo/id-offer.rdo.js';
 import { ParamOfferId } from './type/param-offerid.type.js';
 import { CreateOfferRequest } from './type/create-offer-request.type.js';
@@ -48,7 +48,8 @@ export class OfferController extends BaseController {
   }
 
   public async index({ query } : Request<unknown, unknown, unknown, RequestQuery>, res: Response): Promise<void> {
-    const limit = query?.limit ? Number(query.limit) : DEFAULT_OFFER_COUNT;
+    const limitNum = Number(query?.limit);
+    const limit = query?.limit && !Number.isNaN(limitNum) && limitNum < MAX_OFFER_COUNT ? limitNum : DEFAULT_OFFER_COUNT;
 
     // TODO: Временно сделать const userId = '<ID>';
     // const userId = req.user.id // AFTER JWT
diff --git a/src/shared/modules/user/default-user.service.ts b/src/shared/modules/user/default-user.service.ts
index ea853dd..7f1712a 100644
--- a/src/shared/modules/user/default-user.service.ts
+++ b/src/shared/modules/user/default-user.service.ts
@@ -30,8 +30,7 @@ export class DefaultUserService implements UserService {
 
   // TODO: проверка на существование документа - предложения
   public async exists(documentId: string): Promise<boolean> {
-    return (await this.userModel
-      .exists({_id: documentId})) !== null;
+    return this.userModel.exists({_id: documentId}).then(r => !!r);
   }
 
   public async findByEmail(email: string): Promise<DocumentType<UserEntity> | null> {