diff --git a/comps/vectorstores/langchain/milvus/README.md b/comps/vectorstores/langchain/milvus/README.md
index d02508351..b0f19caf4 100644
--- a/comps/vectorstores/langchain/milvus/README.md
+++ b/comps/vectorstores/langchain/milvus/README.md
@@ -6,7 +6,7 @@ Configure your Milvus instance to suit your application scenarios by adjusting c
 Customized the path to store data, default is /volumes
 
 ```bash
-export DOCKER_VOLUME_DIRECTORY=./your_path
+export DOCKER_VOLUME_DIRECTORY=${your_path}
 ```
 
 ## 2. Run Milvus service