[readme] quote asterisk in shell command on `--latest-npm` example
diff --git a/README.md b/README.md
index 4ffc28f..cc6054d 100644
--- a/README.md
+++ b/README.md
@@ -320,7 +320,7 @@
 To update npm at the same time add the `--latest-npm` flag, like this:
 
 ```sh
-nvm install lts/* --reinstall-packages-from=default --latest-npm
+nvm install 'lts/*' --reinstall-packages-from=default --latest-npm
 ```
 
 or, you can at any time run the following command to get the latest supported npm version on the current node version: