diff --git a/Dockerfile b/Dockerfile
index 36aa0263..73653080 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -87,13 +87,13 @@ RUN echo '#!/bin/sh' > /app/start.sh && \
     echo '# 백엔드 시작 (백그라운드)' >> /app/start.sh && \
     echo 'cd /app/backend' >> /app/start.sh && \
     echo 'echo "Starting backend on port 8080..."' >> /app/start.sh && \
-    echo 'node dist/app.js &' >> /app/start.sh && \
+    echo 'PORT=8080 node dist/app.js &' >> /app/start.sh && \
     echo 'BACKEND_PID=$!' >> /app/start.sh && \
     echo '' >> /app/start.sh && \
     echo '# 프론트엔드 시작 (포그라운드)' >> /app/start.sh && \
     echo 'cd /app/frontend' >> /app/start.sh && \
     echo 'echo "Starting frontend on port 3000..."' >> /app/start.sh && \
-    echo 'exec npm start' >> /app/start.sh && \
+    echo 'PORT=3000 exec npm start' >> /app/start.sh && \
     chmod +x /app/start.sh && \
     chown nodejs:nodejs /app/start.sh
 
@@ -103,7 +103,6 @@ RUN echo '#!/bin/sh' > /app/start.sh && \
 # ============================================================
 ENV NODE_ENV=production \
     LOG_LEVEL=info \
-    PORT=8080 \
     HOST=0.0.0.0 \
     DATABASE_URL="postgresql://postgres:ph0909!!@39.117.244.52:11132/plm" \
     JWT_SECRET="ilshin-plm-super-secret-jwt-key-2024" \