diff --git a/.github/workflows/cd-dev.yml b/.github/workflows/cd-dev.yml
index 0250432..61145bc 100644
--- a/.github/workflows/cd-dev.yml
+++ b/.github/workflows/cd-dev.yml
@@ -2,9 +2,8 @@ name: CD - Deploy to Production Server
 
 on:
   push:
-    branches: [ "dev" ]  # main 브랜치 푸시 시 실행
+    branches: [ "dev" ]
 
-# flow에서 사용할 변수
 env:
   AWS_REGION: ap-northeast-2
   S3_BUCKET_NAME: meerket-bucket
@@ -13,7 +12,6 @@ env:
 
 permissions: write-all
 
-#여기서부터 build job
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -30,33 +28,35 @@ jobs:
         with:
           java-version: '17'
           distribution: 'temurin'
-          
-      # 2.5) secret설정한 env 등록
-      - name: Create .env file from Secret
-        run: |
-          echo "${{ secrets.ENV_FILE_BASE64 }}" | base64 --decode > .env
-
-      # # 4) gradle 테스트 빌드
-      # - name: Build Test with Gradle
-      #   run: ./gradlew test -i
-      #   # run: ./gradlew clean build -i
-      #   # working-directory: ${{ env.working-directory }}
 
       # 3) gradlew 권한 설정
       - name: Grant execute permission for gradlew
-        run: chmod +x ./meerket/gradlew  # gradlew에 실행 권한 부여
+        run: chmod +x ./meerket/gradlew
 
       # 4) gradle 빌드
       - name: Build with Gradle
         working-directory: ./meerket
         run: ./gradlew clean build -x test --no-daemon --info
-  
-  # 여기서부터 배포 job
+
+      # 5) 빌드 결과 확인
+      - name: Verify JAR file
+        run: |
+          echo "Checking build directory..."
+          ls -al ./meerket/meerket-application/build/libs
+          echo "Verifying Spring Boot loader in JAR file..."
+          jar tf ./meerket/meerket-application/build/libs/*.jar | grep "org/springframework/boot/loader" || echo "Spring Boot loader not found"
+
+      # 6) JAR 파일 크기 확인
+      - name: Check JAR File Size
+        run: |
+          echo "JAR file size:"
+          du -h ./meerket/meerket-application/build/libs/*.jar || echo "JAR file not found"
+
   deploy:
-    name: deploy
+    name: Deploy
     runs-on: ubuntu-latest
     environment: production
-    needs: [ build ] # test와 build 작업이 성공적으로 완료된 경우에만 실행
+    needs: [ build ]
 
     steps:
       # 1) 기본 체크아웃
@@ -70,60 +70,34 @@ jobs:
           java-version: '17'
           distribution: 'temurin'
 
-      # 2.5) secret설정한 env 등록
-      - name: Create .env file from Secret
-        run: |
-          echo "${{ secrets.ENV_FILE_BASE64 }}" | base64 --decode > .env
-
-
-      # 2.5) secret 설정한 firesbase json key 등록
-
-      - name: create-json
-        uses: jsdaniell/create-json@v1.2.2
-        with:
-          name: "meerket-83e38-firebase-adminsdk-gyt9i-d2df62fdf4.json"
-          json: ${{secrets.FIREBASE_SERVICE_KEY }}
-          dir: './meerket/meerket-application/src/main/resources'
-
       # 3) gradlew 권한 설정
       - name: Grant execute permission for gradlew
-        run: chmod +x ./meerket/gradlew  # gradlew에 실행 권한 부여
-
-      # # 4) gradle 테스트 빌드
-      # - name: Build Test with Gradle
-      #   run: ./gradlew test -i
-      #   # run: ./gradlew clean build -i
-      #   # working-directory: ${{ env.working-directory }}
-
-      # 4) gradle 빌드
-      - name: Build with Gradle
-        working-directory: ./meerket
-        run: ./gradlew clean build -x test --no-daemon --info
-        # working-directory: ${{ env.working-directory }}
-      
-      # AWS 인증
-      - name: Configure AWS credentials
-        uses: aws-actions/configure-aws-credentials@v1
-        with:
-          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_DEV }}
-          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY_DEV }}
-          aws-region: ${{ env.AWS_REGION }}
+        run: chmod +x ./meerket/gradlew
 
-      # AWS S3에 업로드
+      # 4) S3 업로드 확인
       - name: Upload to AWS S3
         run: |
-          cd meerket 
+          echo "Navigating to build directory..."
+          cd meerket/meerket-application/build/libs
+          ls -al
+          echo "Uploading to S3..."
           aws deploy push \
             --application-name ${{ env.CODE_DEPLOY_APPLICATION_NAME }} \
             --ignore-hidden-files \
             --s3-location s3://$S3_BUCKET_NAME/$GITHUB_SHA.zip \
             --source .
+          echo "Verifying S3 bucket contents..."
+          aws s3 ls s3://${{ env.S3_BUCKET_NAME }}/
 
-      # AWS EC2에 Deploy
+      # 5) AWS EC2에 Deploy
       - name: Deploy to AWS EC2 from S3
         run: |
+          echo "Starting deployment to EC2..."
           aws deploy create-deployment \
             --application-name ${{ env.CODE_DEPLOY_APPLICATION_NAME }} \
             --deployment-config-name CodeDeployDefault.AllAtOnce \
             --deployment-group-name ${{ env.CODE_DEPLOY_DEPLOYMENT_GROUP_NAME }} \
             --s3-location bucket=$S3_BUCKET_NAME,key=$GITHUB_SHA.zip,bundleType=zip
+          echo "Checking deployment status..."
+          aws deploy list-deployments --application-name ${{ env.CODE_DEPLOY_APPLICATION_NAME }} \
+            --deployment-group-name ${{ env.CODE_DEPLOY_DEPLOYMENT_GROUP_NAME }} --query 'deployments' --output json