diff --git a/src/notice/dtos/NoticeListResponse.dto.ts b/src/notice/dtos/NoticeListResponse.dto.ts
index 3dde76d..02bee34 100644
--- a/src/notice/dtos/NoticeListResponse.dto.ts
+++ b/src/notice/dtos/NoticeListResponse.dto.ts
@@ -18,10 +18,10 @@ export class NoticeListResponseDto {
   date: string;
 
   @ApiProperty({
-    description: '전처리된 카테고리 정보',
+    description: '카테고리 정보',
     example: '학사일정',
   })
-  mappedCategory: string;
+  category: string;
 
   @ApiProperty({ description: '학과 정보', example: '컴퓨터학과' })
   provider: string;
@@ -44,7 +44,7 @@ export class NoticeListResponseDto {
     this.scrapped = scrapBoxIds.length > 0;
     this.date = entity.date;
     this.provider = entity.category.provider.name;
-    this.mappedCategory = entity.category.mappedCategory;
+    this.category = entity.category.name;
     this.scrapBoxId = scrapBoxIds;
   }
 }
diff --git a/src/notice/notice.service.ts b/src/notice/notice.service.ts
index 733a330..e4bd910 100644
--- a/src/notice/notice.service.ts
+++ b/src/notice/notice.service.ts
@@ -63,7 +63,7 @@ export class NoticeService {
       });
 
     if (categoryList.length > 0) {
-      queryBuilder.andWhere('category.mappedCategory IN (:...categoryList)', {
+      queryBuilder.andWhere('category.name IN (:...categoryList)', {
         categoryList,
       });
     }
diff --git a/src/pipes/stringValidation.pipe.ts b/src/pipes/stringValidation.pipe.ts
index 6fc43c1..69895d8 100644
--- a/src/pipes/stringValidation.pipe.ts
+++ b/src/pipes/stringValidation.pipe.ts
@@ -3,13 +3,12 @@ import {
   Injectable,
   ArgumentMetadata,
   NotAcceptableException,
-  BadRequestException,
 } from '@nestjs/common';
 
 @Injectable()
 export class StringValidationPipe implements PipeTransform<string, string> {
   transform(value: string, metadata: ArgumentMetadata): string {
-    if (typeof value !== 'string') {
+    if (value !== undefined && typeof value !== 'string') {
       throw new NotAcceptableException(
         `입력값이 유효하지 않습니다 - <${metadata.data}> 해당 변수는 문자열이어야 합니다.`,
       );