diff --git a/deploy/docker-compose.yml b/deploy/docker-compose.yml
index adc1ce17..179d83ca 100644
--- a/deploy/docker-compose.yml
+++ b/deploy/docker-compose.yml
@@ -160,29 +160,40 @@ services:
   # ===========================================================================
   # Redis Cache (DISABLED - Using external Redis at 172.18.0.2:6379)
   # ===========================================================================
-  # To use built-in Redis instead, uncomment the service below and update REDIS_HOST to "redis"
-
-  # redis:
-  #   image: redis:8-alpine
-  #   container_name: sub2api-redis
-  #   restart: unless-stopped
-  #   ulimits:
-  #     nofile:
-  #       soft: 100000
-  #       hard: 100000
-  #   volumes:
-  #     - redis_data:/data
-  #   command: redis-server --save 60 1 --appendonly yes --appendfsync everysec
-  #   environment:
-  #     - TZ=${TZ:-Asia/Shanghai}
-  #   networks:
-  #     - sub2api-network
-  #   healthcheck:
-  #     test: ["CMD", "redis-cli", "ping"]
-  #     interval: 10s
-  #     timeout: 5s
-  #     retries: 5
-  #     start_period: 5s
+  # Built-in Redis is available but not used by default
+  # The application connects to external Redis at 172.18.0.2:6379
+  redis:
+    profiles:
+      - disabled
+    image: redis:8-alpine
+    container_name: sub2api-redis
+    restart: unless-stopped
+    ulimits:
+      nofile:
+        soft: 100000
+        hard: 100000
+    volumes:
+      - redis_data:/data
+    command:
+      - sh
+      - -c
+      - |
+        redis-server \
+          --save 60 1 \
+          --appendonly yes \
+          --appendfsync everysec \
+          $${REDIS_PASSWORD:+--requirepass "$$REDIS_PASSWORD"}
+    environment:
+      - TZ=$${TZ:-Asia/Shanghai}
+      - REDISCLI_AUTH=$${REDIS_PASSWORD:-}
+    networks:
+      - sub2api-network
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 5s
 
 # =============================================================================
 # Volumes