diff --git a/python/examples/encryption/README.md b/python/examples/encryption/README.md
index a08b8b84241fb699992d1a718f2bfbf986d8d180..844fc00ea0e11e5a71b3ee327d70ec12983df1e9 100644
--- a/python/examples/encryption/README.md
+++ b/python/examples/encryption/README.md
@@ -35,11 +35,11 @@ client-side configuration file are stored in the `encrypt_client` directory.
 ## Start Encryption Service
 CPU Service
 ```
-python -m paddle_serving_server.serve --model encrypt_server/ --port 9300 --use_encryption_model
+python -m paddle_serving_server.serve --model encrypt_server/ --port 9300 --use_encryption_model --encryption_rpc_port 9301
 ```
 GPU Service
 ```
-python -m paddle_serving_server.serve --model encrypt_server/ --port 9300 --use_encryption_model --gpu_ids 0
+python -m paddle_serving_server.serve --model encrypt_server/ --port 9300 --use_encryption_model --encryption_rpc_port 9301 --gpu_ids 0
 ```
 
 ## Prediction