diff --git a/deploy/deploy-prod.sh b/deploy/deploy-prod.sh
index d4f2ae4..1c8f4fe 100644
--- a/deploy/deploy-prod.sh
+++ b/deploy/deploy-prod.sh
@@ -1,13 +1,52 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-# 1) 환경변수 로드
-echo "🔧 Deploying with image: $BACKEND_IMAGE"
+# —————————————————————————————————
+# 0) 필수 환경변수
+: "${BACKEND_IMAGE:?Need to set BACKEND_IMAGE (e.g. <ECR_URI>:<TAG>)}"
+: "${AWS_DEFAULT_REGION:?Need to set AWS_DEFAULT_REGION}"
 
-# 2) ECS 서비스 업데이트
+# ECS 리소스 이름
+ECS_CLUSTER="focussu-backend"
+ECS_SERVICE="focussu-backend-prod-service"
+# —————————————————————————————————
+
+echo "🔧 Deploying image → $BACKEND_IMAGE"
+
+# 1) 현재 서비스에 연결된 Task Definition ARN 조회
+CURRENT_TD_ARN=$(aws ecs describe-services \
+  --cluster "$ECS_CLUSTER" \
+  --services "$ECS_SERVICE" \
+  --query 'services[0].taskDefinition' \
+  --output text)
+echo "ℹ️ Current task definition ARN: $CURRENT_TD_ARN"
+
+# 2) Task Definition 상세 가져오기
+TD_JSON=$(aws ecs describe-task-definition \
+  --task-definition "$CURRENT_TD_ARN" \
+  --output json \
+  --query 'taskDefinition')
+
+# 3) register-task-definition 에 넘길 JSON로 정리
+TD_REG_INPUT=$(echo "$TD_JSON" | jq \
+  'del(.taskDefinitionArn, .revision, .status, .requiresAttributes, .compatibilities, .registeredAt, .registeredBy)
+   | .containerDefinitions[0].image = "'"$BACKEND_IMAGE"'"'
+)
+
+# 4) 새 Task Definition 리비전 등록
+NEW_TD_ARN=$(aws ecs register-task-definition \
+  --cli-input-json "$TD_REG_INPUT" \
+  --query 'taskDefinition.taskDefinitionArn' \
+  --output text)
+echo "🆕 Registered new task definition ARN: $NEW_TD_ARN"
+
+# 5) 서비스 업데이트 + 강제 재배포
 aws ecs update-service \
-  --cluster focussu-backend \
-  --service focussu-backend-prod-service \
+  --cluster "$ECS_CLUSTER" \
+  --service "$ECS_SERVICE" \
+  --task-definition "$NEW_TD_ARN" \
   --force-new-deployment \
   --region "$AWS_DEFAULT_REGION" \
   --output json
+
+echo "✅ Deployment triggered!"