diff --git a/README.md b/README.md
index 36099ef..8c8ab83 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ pip install pylyzer
 ### cargo (rust package manager)
 
 ```bash
-cargo install pylyzer
+cargo install pylyzer --locked
 ```
 
 ### build from source