diff --git a/src/modules/decks/dto/create-deck.dto.ts b/src/modules/decks/dto/create-deck.dto.ts
index d98c16e..62306c2 100644
--- a/src/modules/decks/dto/create-deck.dto.ts
+++ b/src/modules/decks/dto/create-deck.dto.ts
@@ -6,7 +6,7 @@ export class CreateDeckDto {
   @Length(3, 30)
   name: string
   /**
-   * Cover image (binary)
+   * Cover image (has to be sent inside FormData, does NOT accept base64)
    */
   @IsOptional()
   @ApiProperty({ type: 'string', format: 'binary' })
diff --git a/src/modules/decks/dto/get-all-decks.dto.ts b/src/modules/decks/dto/get-all-decks.dto.ts
index ae503dd..02ac9a2 100644
--- a/src/modules/decks/dto/get-all-decks.dto.ts
+++ b/src/modules/decks/dto/get-all-decks.dto.ts
@@ -1,10 +1,24 @@
-import { ApiHideProperty } from '@nestjs/swagger'
+import { ApiHideProperty, ApiProperty } from '@nestjs/swagger'
 import { Type } from 'class-transformer'
-import { IsNumber, IsOptional, IsUUID } from 'class-validator'
+import { IsEnum, IsNumber, IsOptional, IsUUID } from 'class-validator'
 
 import { PaginationDto } from '../../../infrastructure/common/pagination/pagination.dto'
 import { IsOptionalOrEmptyString, IsOrderBy } from '../../../infrastructure/decorators'
 
+export enum DecksOrderBy {
+  'null' = 'null',
+  'cardsCount-asc' = 'cardsCount-asc',
+  'updated-asc' = 'updated-asc',
+  'name-asc' = 'name-asc',
+  'author.name-asc' = 'author.name-asc',
+  'created-asc' = 'created-asc',
+  'cardsCount-decs' = 'cardsCount-decs',
+  'updated-decs' = 'updated-decs',
+  'name-decs' = 'name-decs',
+  'author.name-decs' = 'author.name-decs',
+  'created-decs' = 'created-decs',
+}
+
 export class GetAllDecksDto extends PaginationDto {
   @IsOptional()
   @Type(() => Number)
@@ -34,5 +48,9 @@ export class GetAllDecksDto extends PaginationDto {
    * @example "name-desc"
    * */
   @IsOrderBy()
-  orderBy?: string | null
+  @ApiProperty({
+    enum: DecksOrderBy,
+  })
+  @IsEnum(DecksOrderBy)
+  orderBy?: DecksOrderBy
 }
diff --git a/src/modules/decks/dto/update-deck.dto.ts b/src/modules/decks/dto/update-deck.dto.ts
index 6549330..87ab5ec 100644
--- a/src/modules/decks/dto/update-deck.dto.ts
+++ b/src/modules/decks/dto/update-deck.dto.ts
@@ -14,6 +14,9 @@ export class UpdateDeckDto extends PartialType(CreateDeckDto) {
   @IsBoolean()
   isPrivate?: boolean
 
+  /**
+   * Cover image (has to be sent inside FormData, does NOT accept base64)
+   */
   @IsOptionalOrEmptyString()
   @ApiProperty({ type: 'string', format: 'binary' })
   cover?: string
diff --git a/src/modules/decks/infrastructure/decks.repository.ts b/src/modules/decks/infrastructure/decks.repository.ts
index ccf4d07..80f69e8 100644
--- a/src/modules/decks/infrastructure/decks.repository.ts
+++ b/src/modules/decks/infrastructure/decks.repository.ts
@@ -2,7 +2,7 @@ import { Injectable, InternalServerErrorException, Logger } from '@nestjs/common
 import { omit } from 'remeda'
 
 import { PrismaService } from '../../../prisma.service'
-import { GetAllDecksDto } from '../dto'
+import { DecksOrderBy, GetAllDecksDto } from '../dto'
 import { Deck, PaginatedDecks } from '../entities/deck.entity'
 
 @Injectable()
@@ -68,7 +68,7 @@ export class DecksRepository {
     orderBy,
   }: GetAllDecksDto): Promise<PaginatedDecks> {
     if (!orderBy || orderBy === 'null') {
-      orderBy = 'updated-desc' // Adjust this based on your actual ordering requirements
+      orderBy = DecksOrderBy['updated-desc'] // Adjust this based on your actual ordering requirements
     }
     let orderField = 'd.updated' // default order field
     let orderDirection = 'DESC' // default order direction