diff --git a/backend/mpc-system/docker-compose.yml b/backend/mpc-system/docker-compose.yml
index 69482573..4378023a 100644
--- a/backend/mpc-system/docker-compose.yml
+++ b/backend/mpc-system/docker-compose.yml
@@ -86,6 +86,9 @@ services:
       context: .
       dockerfile: services/session-coordinator/Dockerfile
     container_name: mpc-session-coordinator
+    ports:
+      # 对外暴露端口 8081，供 mpc-service 调用
+      - "8081:8080"
     environment:
       MPC_SERVER_GRPC_PORT: 50051
       MPC_SERVER_HTTP_PORT: 8080
@@ -128,6 +131,9 @@ services:
       context: .
       dockerfile: services/message-router/Dockerfile
     container_name: mpc-message-router
+    ports:
+      # 对外暴露端口 8082，供 mpc-service WebSocket 连接
+      - "8082:8080"
     environment:
       MPC_SERVER_GRPC_PORT: 50051
       MPC_SERVER_HTTP_PORT: 8080
diff --git a/backend/services/.env.example b/backend/services/.env.example
index 11d76da7..7ce0700e 100644
--- a/backend/services/.env.example
+++ b/backend/services/.env.example
@@ -27,6 +27,6 @@ BACKUP_ENCRYPTION_KEY=your_64_char_hex_key_here
 # MPC Share Master Key (256-bit hex: openssl rand -hex 32)
 SHARE_MASTER_KEY=your_64_char_hex_key_here
 
-# MPC System Address (running on 192.168.1.100)
-MPC_COORDINATOR_URL=http://192.168.1.100:8081
-MPC_MESSAGE_ROUTER_URL=ws://192.168.1.100:8082
+# MPC System Address (running on 192.168.1.111)
+MPC_COORDINATOR_URL=http://192.168.1.111:8081
+MPC_MESSAGE_ROUTER_URL=ws://192.168.1.111:8082
diff --git a/backend/services/deploy.sh b/backend/services/deploy.sh
index c4614ee1..5b4c104a 100644
--- a/backend/services/deploy.sh
+++ b/backend/services/deploy.sh
@@ -113,9 +113,9 @@ BACKUP_ENCRYPTION_KEY=${BACKUP_ENCRYPTION_KEY}
 # MPC Share Master Key (256-bit hex key)
 SHARE_MASTER_KEY=${SHARE_MASTER_KEY}
 
-# MPC System Address (on 192.168.1.100)
-MPC_COORDINATOR_URL=http://192.168.1.100:8081
-MPC_MESSAGE_ROUTER_URL=ws://192.168.1.100:8082
+# MPC System Address (on 192.168.1.111)
+MPC_COORDINATOR_URL=http://192.168.1.111:8081
+MPC_MESSAGE_ROUTER_URL=ws://192.168.1.111:8082
 EOF
 
         chmod 600 "$ENV_FILE"
diff --git a/backend/services/docker-compose.yml b/backend/services/docker-compose.yml
index 7a50b79a..046bb9ff 100644
--- a/backend/services/docker-compose.yml
+++ b/backend/services/docker-compose.yml
@@ -334,8 +334,8 @@ services:
       - KAFKA_BROKERS=kafka:29092
       - KAFKA_CLIENT_ID=mpc-service
       - KAFKA_GROUP_ID=mpc-service-group
-      - MPC_COORDINATOR_URL=http://192.168.1.100:8081
-      - MPC_MESSAGE_ROUTER_WS_URL=ws://192.168.1.100:8082
+      - MPC_COORDINATOR_URL=http://192.168.1.111:8081
+      - MPC_MESSAGE_ROUTER_WS_URL=ws://192.168.1.111:8082
       - SHARE_MASTER_KEY=${SHARE_MASTER_KEY}
     depends_on:
       postgres: