diff --git a/_pytest/vendored_packages/README.md b/_pytest/vendored_packages/README.md
index 48ecdf08d..191b3c4f0 100644
--- a/_pytest/vendored_packages/README.md
+++ b/_pytest/vendored_packages/README.md
@@ -6,8 +6,8 @@ package, please see [this issue](https://github.com/pytest-dev/pytest/issues/944
 To update the current version, execute:
 
 ```
-$ pip install pluggy==<version> --no-compile --target-dir=_pytest/vendored_packages
+$ pip install pluggy==<version> --no-compile --target=_pytest/vendored_packages
 ```
 
 And commit the modified files. The `pluggy-<version>.dist-info` directory 
-created by `pip` should be ignored.
\ No newline at end of file
+created by `pip` should be ignored.