diff --git a/back/src/main/resources/application-prod.yml b/back/src/main/resources/application-prod.yml
index aea2dae..a31d3fe 100644
--- a/back/src/main/resources/application-prod.yml
+++ b/back/src/main/resources/application-prod.yml
@@ -80,4 +80,4 @@ ai:
     enabled: false                                     # 프로덕션 환경에서는 활성화
     storage-type: s3                                  # S3 스토리지 사용
     s3-bucket-name: ${AWS_S3_BUCKET_NAME}
-    s3-region: ${AWS_S3_REGION}
\ No newline at end of file
+    s3-region: ${AWS_REGION}
\ No newline at end of file
diff --git a/back/src/main/resources/application.yml b/back/src/main/resources/application.yml
index 7b027b4..ee335f7 100644
--- a/back/src/main/resources/application.yml
+++ b/back/src/main/resources/application.yml
@@ -128,7 +128,7 @@ custom:
   dev:
     baseDomain: localhost
     frontUrl: "http://${custom.dev.baseDomain}:3000"
-    backUrl: "http://${custom.dev.baseDomain}:${server.port}"
+    backUrl: "http://${custom.dev.baseDomain}:8080"
   prod:
     baseDomain: ${PROD_BASE_DOMAIN}
     frontUrl: "https://www.${custom.prod.baseDomain}"