diff --git a/README.md b/README.md
index ee0779d..26ce2c6 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ Note: The current user must have permission to manage Docker instances. [How to
 Install the latest version
 
 ``` sh
-cargo install ckb-capsule
+cargo install ckb-capsule --locked
 ```
 
 Install the develop branch