diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index bebfb71..8238d7d 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -2,7 +2,7 @@ name: Build and Deploy Spring Boot to AWS EC2
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
 
 env:
   PROJECT_NAME: Nanali
@@ -16,31 +16,43 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
-        
+
       - name: Setup Java JDK 17
         uses: actions/setup-java@v1
         with:
           java-version: 17
 
+      - uses: actions/checkout@v2
+      - run: touch ./src/main/resources/application.properties
+      - run: echo "${{ secrets.APPLICATION }}" > ./src/main/resources/application.properties
+
       - name: Grant execute permission for gradlew
         run: chmod +x ./gradlew
         shell: bash
-      
+
       - name: Build with Gradle
         run: ./gradlew build
         shell: bash
-        
+
+      - name: Modify application.properties
+      - run: |
+          sed -i 's/spring.datasource.url =.*/spring.datasource.url = ${DB_URL}/' ./src/main/resources/application.properties
+          sed -i 's/spring.datasource.username =.*/spring.datasource.username = ${DB_username}/' ./src/main/resources/application.properties
+          sed -i 's/spring.datasource.password =.*/spring.datasource.password = ${DB_password}/' ./src/main/resources/application.properties
+          sed -i 's/cloud.aws.credentials.access-key =.*/cloud.aws.credentials.access-key = ${AWS_ACCESS_KEY_ID}/' ./src/main/resources/application.properties
+          sed -i 's/cloud.aws.credentials.secret-key =.*/cloud.aws.credentials.secret-key = ${AWS_SECRET_ACCESS_KEY}/' ./src/main/resources/application.properties
+
       - name: Make Zip File
         run: zip -qq -r ./$GITHUB_SHA.zip .
         shell: bash
-      
+
       - name: Configure AWS credentials
         uses: aws-actions/configure-aws-credentials@v1
         with:
           aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
           aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
           aws-region: ap-northeast-2
-      
+
       - name: Upload to S3
         run: aws s3 cp --region ap-northeast-2 ./$GITHUB_SHA.zip s3://$BUCKET_NAME/$PROJECT_NAME/$GITHUB_SHA.zip