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---
title: 'Development'
description: 'Learn how to preview changes locally'
---
<Info>
**Prerequisite** You should have installed Node.js (version 18.10.0 or
higher).
</Info>
Step 1. Install Mintlify on your OS:
<CodeGroup>
```bash npm
npm i -g mintlify
```
```bash yarn
yarn global add mintlify
```
</CodeGroup>
Step 2. Go to the docs are located (where you can find `mint.json`) and run the following command:
```bash
mintlify dev
```
The documentation website is now available at `http://localhost:3000`.
### Custom Ports
Mintlify uses port 3000 by default. You can use the `--port` flag to customize the port Mintlify runs on. For example, use this command to run in port 3333:
```bash
mintlify dev --port 3333
```
You will see an error like this if you try to run Mintlify in a port that's already taken:
```md
Error: listen EADDRINUSE: address already in use :::3000
```
## Mintlify Versions
Each CLI is linked to a specific version of Mintlify. Please update the CLI if your local website looks different than production.
<CodeGroup>
```bash npm
npm i -g mintlify@latest
```
```bash yarn
yarn global upgrade mintlify
```
</CodeGroup>
## Deployment
<Tip>
Unlimited editors available under the [Startup
Plan](https://mintlify.com/pricing)
</Tip>
You should see the following if the deploy successfully went through:
<Frame>
<img src="/images/checks-passed.png" style={{ borderRadius: '0.5rem' }} />
</Frame>
## Troubleshooting
Here's how to solve some common problems when working with the CLI.
<AccordionGroup>
<Accordion title="Mintlify is not loading">
Update to Node v18. Run `mintlify install` and try again.
</Accordion>
<Accordion title="No such file or directory on Windows">
Go to the `C:/Users/Username/.mintlify/` directory and remove the `mint`
folder. Then Open the Git Bash in this location and run `git clone
https://github.com/mintlify/mint.git`.
Repeat step 3.
</Accordion>
<Accordion title="Getting an unknown error">
Try navigating to the root of your device and delete the ~/.mintlify folder.
Then run `mintlify dev` again.
</Accordion>
</AccordionGroup>
Curious about what changed in a CLI version? [Check out the CLI changelog.](/changelog/command-line)
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