# Manage Node.js version in a Foundry code repository

Foundry code repositories support [Node Version Manager (nvm) ↗](https://github.com/nvm-sh/nvm) to manage the Node.js version used in your project and CI. By adding an `.nvmrc` file to the root of your repository, you can specify which Node.js version your project uses.

:::callout{theme="neutral"}
If you do not use nvm, the CI will use the Node.js version specified in `.jemma/settings.sh` and the Foundry development environment will use version `18.20.8`.
:::

## Add an `.nvmrc` file

To set a Node.js version for your repository, create a file named `.nvmrc` in the root of your project. This file should contain only the version number of Node.js you want to use, prefixed with `v`, for example:

```
v24.13.0
```

You can view available Node.js versions by running `nvm ls-remote` in a terminal within your code repository.

## Use the specified version

After adding the `.nvmrc` file, run the following command in the terminal to switch to the version defined in the file:

```bash
nvm install
```

## Configure CI to use the `.nvmrc` version

To ensure your CI builds use the same Node.js version specified in your `.nvmrc` file, update the `.jemma/settings.sh` file in your repository.

Replace the existing `NODE_INSTALLATION_VERSION` export with the following line, which reads the version directly from your `.nvmrc` file:

```bash
export NODE_INSTALLATION_VERSION=$(sed 's/^v//' "$(dirname "${BASH_SOURCE[0]}")/../.nvmrc")
```

With this change, you only need to update the `.nvmrc` file to change the Node.js version for both your Foundry development and CI environments.