diff --git a/README.md b/README.md
index 40b7f6a..fecceae 100644
--- a/README.md
+++ b/README.md
@@ -55,13 +55,14 @@ jobs:
 
 This action takes the following parameters:
 
-| Key            | Type                                       | Required? | Description                                                                                                                               |
-| -------------- | ------------------------------------------ | --------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
-| `command`      | string (one of `build`, `test`, or `both`) | no        | The command(s) to run. The default is `build`. Running the `test` command will fails with \*BSD targets, non-x86 Windows, and macOS ARM.  |
-| `target`       | string                                     | yes       | The target triple to compile for. This should be one of the targets listed by running `rustup target list`.                               |
-| `GITHUB_TOKEN` | string                                     | no        | Defaults to the value of `${{ github.token }}`.                                                                                           |
-| `args`         | string                                     | no        | A string-separated list of arguments to be passed to `cross build`, like `--release --locked`.                                            |
-| `strip`        | boolean (`true` or `false`)                | no        | If this is true, then the resulting binary will be stripped if possible. This is only possible for binaries which weren't cross-compiled. |
+| Key            | Type                                           | Required? | Description                                                                                                                               |
+| -------------- | ---------------------------------------------- | --------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
+| `command`      | string (one of `build`, `test`, or `both`)     | no        | The command(s) to run. The default is `build`. Running the `test` command will fails with \*BSD targets, non-x86 Windows, and macOS ARM.  |
+| `target`       | string                                         | yes       | The target triple to compile for. This should be one of the targets listed by running `rustup target list`.                               |
+| `toolchain`    | string (one of `stable`, `beta`, or `nightly`) | no        | The Rust toolchain version to install. The default is `stable`                                                                            |
+| `GITHUB_TOKEN` | string                                         | no        | Defaults to the value of `${{ github.token }}`.                                                                                           |
+| `args`         | string                                         | no        | A string-separated list of arguments to be passed to `cross build`, like `--release --locked`.                                            |
+| `strip`        | boolean (`true` or `false`)                    | no        | If this is true, then the resulting binary will be stripped if possible. This is only possible for binaries which weren't cross-compiled. |
 
 ## How it Works