diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5dc33b2..a2cc254 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,6 +13,7 @@ on:
     types:
       - opened
       - reopened
+      - synchronize
     paths-ignore:
       - 'README.md'
 
diff --git a/src/domains/auth/signup/signupController.js b/src/domains/auth/signup/signupController.js
index b8dd0bb..1028033 100644
--- a/src/domains/auth/signup/signupController.js
+++ b/src/domains/auth/signup/signupController.js
@@ -2,6 +2,7 @@ const signupService = require('./signupService');
 const { signupValidation } = require('./signupValidation');
 const logger = require('../../../config/logger');
 const { validationResult } = require('express-validator');
+const SignupDto = require('./signupDto');
 
 const signupController = [
   ...signupValidation, // 유효성 검사 미들웨어 추가
@@ -14,30 +15,28 @@ const signupController = [
       const errors = validationResult(req);
       if (!errors.isEmpty()) {
         const statusCode = 400;
-        logger.warn(`(${statusCode}) Validation failed: ${errors.array().map(err => err.msg).join(', ')}`); // 검증 실패 로깅
-        return res.status(400).json({ message: errors.array().map(err => err.msg).join(', ') });
+        logger.warn(`(${statusCode}) user validation failed: ${errors.array().map(err => err.msg).join(', ')}`); // 검증 실패 로깅
+        return res.status(400).json({ 
+          "Invalid values": errors.array().map(err => ({ message: err.msg }))
+        });
       }
 
-      // gender 값 변환
-      let gender = req.body.gender;
-      if (gender === '남성') gender = 'm';
-      if (gender === '여성') gender = 'f';
-      if (gender === '비공개') gender = 'n';
-
-      const signupData = {
-        ...req.body,
-        gender,
-      };
+      const userData = new SignupDto(req.body.username, req.body.password, req.body.name, req.body.gender, req.body.birthDate);
 
       // 회원가입 처리
-      const user = await signupService.signupUser(signupData);
+      const user = await signupService.createUser(userData);
       logger.info(`User created successfully: ID=${user.id}, username=${user.username}`); // 성공 로깅
-      const { password, ...userWithoutPassword } = user;
-      return res.status(201).json(userWithoutPassword);
 
+      const responseUser = {
+        ...user,
+        gender: SignupDto.convertGenderToKorean(user.gender),
+        password: undefined
+      };
+      
+      return res.status(201).json(responseUser);
     } catch (error) {
       const statusCode = 500;
-      logger.error(`(${statusCode}) Signup failed: ${error.message}`); // 오류 로깅
+      logger.error(`(${statusCode}) Signup failed: ${error.message}\nStack trace: ${error.stack}`);
       return res.status(500).json({ message: '서버 오류', error: error.message });
     }
   }
diff --git a/src/domains/auth/signup/signupDto.js b/src/domains/auth/signup/signupDto.js
index b9bd992..5bceb1e 100644
--- a/src/domains/auth/signup/signupDto.js
+++ b/src/domains/auth/signup/signupDto.js
@@ -1,4 +1,4 @@
-class SignupDto {
+class signupDto {
   constructor(username, password, name, gender, birthDate) {
     this.username = username;
     this.password = password;
@@ -6,6 +6,22 @@ class SignupDto {
     this.gender = gender;
     this.birthDate = birthDate;
   }
+
+  // DB에 저장할 때
+  static convertGenderToEnglish(gender) {
+    if (gender === '남성') return 'm';
+    if (gender === '여성') return 'f';
+    if (gender === '비공개') return 'n';
+    return gender; // 유효하지 않은 값은 그대로 반환
+  }
+
+  // DB에서 값을 가져올 때
+  static convertGenderToKorean(gender) {
+    if (gender === 'm') return '남성';
+    if (gender === 'f') return '여성';
+    if (gender === 'n') return '비공개';
+    return gender; // 유효하지 않은 값은 그대로 반환
+  }
 }
 
-module.exports = SignupDto;
\ No newline at end of file
+module.exports = signupDto;
\ No newline at end of file
diff --git a/src/domains/auth/signup/signupRepository.js b/src/domains/auth/signup/signupRepository.js
index fb8e291..0d81c92 100644
--- a/src/domains/auth/signup/signupRepository.js
+++ b/src/domains/auth/signup/signupRepository.js
@@ -20,7 +20,6 @@ const createUser = async (SignupDto) => {
     });
     return user;
   } catch (error) {
-    console.error('Error stack trace:', error.stack);  // 에러 스택을 콘솔에 출력
     logger.error(`createUser failed: ${error.message}`);
     throw new Error('createUser 실패');
   }
diff --git a/src/domains/auth/signup/signupService.js b/src/domains/auth/signup/signupService.js
index 3833c1f..50fb536 100644
--- a/src/domains/auth/signup/signupService.js
+++ b/src/domains/auth/signup/signupService.js
@@ -2,22 +2,23 @@ const bcrypt = require('bcryptjs');
 const signupRepository = require('./signupRepository');
 const SignupDto = require('./signupDto');
 
-const signupUser = async (signupData) => {
+const createUser = async (userData) => {
   // 비밀번호 해싱
-  const hashedPassword = await bcrypt.hash(signupData.password, 10);
+  const hashedPassword = await bcrypt.hash(userData.password, 10);
 
-  const signupDto = new SignupDto(
-    signupData.username,
-    hashedPassword,
-    signupData.name,
-    signupData.gender,
-    signupData.birthDate
-  );
+  const gender = SignupDto.convertGenderToEnglish(userData.gender);
 
-  // 유저 생성
-  const newUser = await signupRepository.createUser(signupDto);
+  // DB에 저장할 객체 생성
+  const newUser = {
+    username: userData.username,
+    password: hashedPassword,
+    name: userData.name,
+    gender: gender,
+    birthDate: userData.birthDate,
+  };
 
-  return newUser;
+  // 유저 생성
+  return await signupRepository.createUser(newUser);
 };
 
-module.exports = { signupUser };
\ No newline at end of file
+module.exports = { createUser };
\ No newline at end of file
diff --git a/src/domains/auth/signup/signupValidation.js b/src/domains/auth/signup/signupValidation.js
index 5f91841..5d1234a 100644
--- a/src/domains/auth/signup/signupValidation.js
+++ b/src/domains/auth/signup/signupValidation.js
@@ -3,43 +3,60 @@ const { prisma } = require('../../../config/db');
 
 const signupValidation = [
   body('username')
-  .isString()
-  .notEmpty()
-  .withMessage('Username is required.')
-  .isLength({ min: 5, max: 20 })
-  .withMessage('Username must be between 5 and 20 characters.')
-  .custom(async (value) => {
-    // Prisma를 사용해 username 중복 확인
-    const existingUser = await prisma.user.findUnique({
-      where: { username: value },
-    });
-
-    if (existingUser) {
-      throw new Error('Username already exists. Please choose another.');
-    }
-  }),
+    .notEmpty().withMessage('Username is required.')
+    .isString().withMessage('Username must be a string.')
+    .isLength({ min: 5, max: 20 }).withMessage('Username must be between 5 and 20 characters.')
+    .custom(async (value) => {
+      const existingUser = await prisma.user.findUnique({
+        where: { username: value },
+      });
+      if (existingUser) {
+        throw new Error('Username already exists. Please choose another.');
+      }
+    }),
 
   body('password')
-    .isString()
-    .notEmpty()
-    .withMessage('Password is required.')
-    .isLength({ min: 8 })
-    .withMessage('Password must be at least 8 characters long.'),
-  
-  body('gender')
-    .isIn(['남성', '여성', '비공개'])
-    .withMessage('Gender must be either 남성, 여성, or 비공개.'),
-  
-  body('birthDate')
-    .matches(/^\d{4}-\d{2}-\d{2}$/)  // YYYY-MM-DD 형식을 검증하는 정규 표현식
-    .withMessage('Birthdate must be a valid date in YYYY-MM-DD format.'),
+    .notEmpty().withMessage('Password is required.')
+    .custom((value) => {
+      if (value && value.length < 8) {
+        throw new Error('Password must be at least 8 characters long.');
+      }
+      return true;
+    }),
 
   body('name')
-    .isString()
-    .notEmpty()
-    .withMessage('Name is required.')
-    .isLength({ max: 50 })
-    .withMessage('Name must not exceed 50 characters.')
+    .custom((value) => {
+      if (!value) {
+        throw new Error('Name is required.');
+      }
+      if (typeof value !== 'string') {
+        throw new Error('Name must be a string.');
+      }
+      if (value.length > 50) {
+        throw new Error('Name must not exceed 50 characters.');
+      }
+      return true;
+    }), 
+
+  body('gender')
+    .notEmpty().withMessage('Gender is required.')
+    .custom((value) => {
+      if (value && !['남성', '여성', '비공개'].includes(value)) {
+        throw new Error('Gender must be either 남성, 여성, or 비공개.');
+      }
+      return true;
+    }),
+
+  body('birthDate')
+    .custom((value) => {
+      if (!value) {
+        throw new Error('Birthdate is required.');
+      }
+      if (!/^\d{4}-\d{2}-\d{2}$/.test(value)) {
+        throw new Error('Birthdate must be a valid date in YYYY-MM-DD format.');
+      }
+      return true;
+    }),
 ];
 
 module.exports = { signupValidation };
diff --git a/src/domains/timeline/controller/timelineController.js b/src/domains/timeline/controller/timelineController.js
index 587e9f8..394945e 100644
--- a/src/domains/timeline/controller/timelineController.js
+++ b/src/domains/timeline/controller/timelineController.js
@@ -5,7 +5,7 @@ const timelineService = require('../service/timelineService');
 const createTimeline = async (req, res) => {
   const userId = req.user.id; // JWT 토큰에서 사용자 정보 가져오기
   const { name, items } = req.body; // 요청 본문에서 타임라인 이름과 아이템들 받기
-  logger.info(`Received request to create timeline: userId = ${userId}, name = ${name}`);
+  logger.info(`Received request to create timeline: ${req.method} ${req.originalUrl}, userId=${userId}, name=${name}`);
 
   if (!name) {
     return res.status(400).json({ success: false, message: 'Timeline name is required' });
@@ -26,7 +26,7 @@ const createTimeline = async (req, res) => {
 const deleteTimeline = async (req, res) => {
   const userId = req.user.id;    
   const { timelineId } = req.params;
-  logger.info(`Received request to delete timeline: userId = ${userId}, timelineId = ${timelineId}`);
+  logger.info(`Received request to delete timeline: ${req.method} ${req.originalUrl}, userId=${userId}, timelineId=${timelineId}`);
 
   try {
     const isDeleted = await timelineService.deleteTimeline(userId, timelineId);
@@ -47,7 +47,7 @@ const deleteTimeline = async (req, res) => {
 // 타임라인 목록 조회
 const getTimelines = async (req, res) => {
   const userId = req.user.id;
-  logger.info(`Received request to fetch timelines for user: ${userId}`);
+  logger.info(`Received request to fetch timelines for user: ${req.method} ${req.originalUrl}, userId=${userId}`);
   
   try {
     const timelines = await timelineService.getTimelines(userId);
@@ -63,7 +63,7 @@ const getTimelines = async (req, res) => {
 const getTimelineById = async (req, res) => {
   const { timelineId } = req.params; 
   const userId = req.user.id;
-  logger.info(`Received request to fetch a timeline: userId = ${userId}, timelineId = ${timelineId}`);
+  logger.info(`Received request to fetch a timeline: ${req.method} ${req.originalUrl}, userId=${userId}, timelineId=${timelineId}`);
 
   try {
     const timeline = await timelineService.getTimelineById(timelineId, userId);
@@ -86,7 +86,7 @@ const updateTimeline = async (req, res) => {
   const { timelineId } = req.params;
   const userId = req.user.id;
   const { name, items } = req.body;
-  logger.info(`Received request to update a timeline: userId = ${userId}, timelineId = ${timelineId}`);
+  logger.info(`Received request to update a timeline: ${req.method} ${req.originalUrl}, userId=${userId}, timelineId=${timelineId}`);
 
   try {
     const updatedTimeline = await timelineService.updateTimeline(userId, timelineId, name, items);
@@ -101,6 +101,7 @@ const updateTimeline = async (req, res) => {
   } catch (error) {
     // 순서 이상 오류 처리
     if (error.code === 'INVALID_POSITIONS') {
+      logger.warn(`Invalid positions error: ${error.message}`);
       return res.status(400).json({
         success: false,
         message: 'Positions must be consecutive starting from 1 and cannot have duplicates.',
@@ -109,6 +110,7 @@ const updateTimeline = async (req, res) => {
   
     // 중복된 scrapId 오류 처리
     if (error.code === 'DUPLICATE_SCRAPS') {
+      logger.warn(`Duplicate scrapId error: ${error.message}`);
       return res.status(400).json({
         success: false,
         message: 'Duplicate scrapId found within the same timeline.',
diff --git a/src/domains/timeline/service/timelineService.js b/src/domains/timeline/service/timelineService.js
index e79fae7..18fe0c8 100644
--- a/src/domains/timeline/service/timelineService.js
+++ b/src/domains/timeline/service/timelineService.js
@@ -117,7 +117,7 @@ const deleteTimeline = async (userId, timelineId) => {
     logger.info(`Successfully deleted timeline ${timelineId} for user ${userId}`);
     return true;
   } catch (error) {
-    logger.error(`Error deleting timeline ${timelineId}: ${error.message}`);
+    logger.error(`Error deleting timeline ${timelineId}: ${error.message}\nStack trace: ${error.stack}`);
     throw error;
   }
 };
@@ -137,7 +137,7 @@ const getTimelines = async (userId) => {
 
     return timelines;
   } catch (error) {
-    logger.error(`Error retrieving timelines for user: ${userId}, Error: ${error.message}`);
+    logger.error(`Error retrieving timelines for user: ${userId}, Error: ${error.message}\nStack trace: ${error.stack}`);
     throw error; 
   }
 };
@@ -163,7 +163,7 @@ const getTimelineById = async (timelineId, userId) => {
     logger.info(`Successfully retrieved timeline with ID: ${timelineId} for user: ${userId}`);
     return { ...timeline, items: itemsWithArticles };
   } catch (error) {
-    logger.error(`Error retrieving timeline with ID: ${timelineId} for user: ${userId}, Error: ${error.message}`);
+    logger.error(`Error retrieving timeline with ID: ${timelineId} for user: ${userId}, Error: ${error.message}\nStack trace: ${error.stack}`);
     throw error;
   }
 };
@@ -233,7 +233,7 @@ const updateTimeline = async (userId, timelineId, name, items) => {
       return updatedTimeline;
     });
   } catch (error) {
-    logger.error(`Error updating timeline: ${error.message}, userId = ${userId}, timelineId = ${timelineId}`);
+    logger.error(`Error updating timeline: ${error.message}, userId = ${userId}, timelineId = ${timelineId}\nStack trace: ${error.stack}`);
     throw error;
   }
 };