diff --git a/README.md b/README.md
index e170249..68c757f 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 
 [`nvm`](https://github.com/creationix/nvm) is an awesome tool but it can be kind of a pain to install and keep up to date. This zsh plugin allows you to quickly setup `nvm` once, save it in your dotfiles, then never worry about it again.
 
-The plugin will install the latest stable release of `nvm` if you don't already have it, and then automatically `source` it for you. You can upgrade `nvm` to the latest version whenever you want without losing your installed `node` versions by running `nvm_update`.
+The plugin will install the latest stable release of `nvm` if you don't already have it, and then automatically `source` it for you. You can upgrade `nvm` to the latest version whenever you want without losing your installed `node` versions by running `nvm upgrade`.
 
 Although this is written as a zsh plugin, it also works with bash if you follow the [manual installation instructions](#manually).
 
@@ -15,7 +15,7 @@ Once the plugin's installed `nvm` will be available. You'll probably want to loa
 If you want to update `nvm`:
 
 ```shell
-% nvm_update
+% nvm upgrade
 Installed version is v0.31.1
 Checking latest version of nvm...
 Updating to v0.31.2...