diff --git a/backend/docker-compose.yml b/backend/docker-compose.yml
index bf91ef0..15d6518 100644
--- a/backend/docker-compose.yml
+++ b/backend/docker-compose.yml
@@ -46,5 +46,5 @@ services:
 
 networks:
   app-network:
+    external: true
     name: fastapi-shared-network
-    driver: bridge
diff --git a/backend/scripts/blue-green-deploy.sh b/backend/scripts/blue-green-deploy.sh
index 8856caf..395c70d 100755
--- a/backend/scripts/blue-green-deploy.sh
+++ b/backend/scripts/blue-green-deploy.sh
@@ -112,6 +112,10 @@ restart_nginx() {
 
 # Nginx 시작 함수
 start_nginx_if_needed() {
+    # 공유 네트워크 생성 (이미 있으면 무시됨)
+    echo "🌐 공유 네트워크 확인 중..."
+    docker network create fastapi-shared-network 2>/dev/null || echo "네트워크가 이미 존재합니다."
+    
     if ! docker ps | grep -q "nginx"; then
         echo "🌐 Nginx 로드 밸런서 시작..."
         # nginx만 단독으로 시작