> For the complete documentation index, see [llms.txt](https://docs.chord.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.chord.co/chord-oms/shopify/developer-tools/gatsby/guides/v2-x-to-v3-x-migration-guide.md).

# v2.x to v3.x Migration Guide

This major release of this Gatsby theme moves Gatsby and all related Gatsby plugins and transformers from direct `dependencies` to `peerDependencies` so that consumers of this package can upgrade Gatsby without any intervention from Chord. This will require you to do more than just bump this version in the `package.json`.

## Upgrade Guide

First, edit your `package.json` to remove `@chordcommerce/gatsby-theme-performance` and any of the package's `peerDependencies` from your `dependencies` list. We will be reinstalling them next. These `peerDependencies` are:

{% code title="peerDependencies" %}

```json
"@sentry/browser": ">=6.0.0",
"gatsby": "^4.4.0",
"gatsby-plugin-alias-imports": "^1.0.5",
"gatsby-plugin-image": "^2.4.0",
"gatsby-plugin-intl": "^0.3.3",
"gatsby-plugin-manifest": "^4.4.0",
"gatsby-plugin-netlify": "^4.2.0",
"gatsby-plugin-offline": "^5.4.0",
"gatsby-plugin-react-helmet": "^5.4.0",
"gatsby-plugin-robots-txt": "^1.6.14",
"gatsby-plugin-segment-js": "^3.7.1",
"gatsby-plugin-sharp": "^4.4.0",
"gatsby-plugin-sitemap": "^4.4.0",
"gatsby-react-router-scroll": "^4.4.0",
"gatsby-source-contentful": "^7.2.0",
"gatsby-transformer-inline-svg": "^1.2.0",
"gatsby-transformer-remark": "^5.4.0",
"gatsby-transformer-sharp": "^4.4.0",
"react": "^17.0.2",
"react-dom": "^17.0.2"
```

{% endcode %}

Then, run the following command in your shell:

{% tabs %}
{% tab title="yarn" %}

```shell
$ npx install-peerdeps --yarn @chordcommerce/gatsby-theme-performance
```

{% endtab %}

{% tab title="npm" %}

```shell
$ npx install-peerdeps @chordcommerce/gatsby-theme-performance
```

{% endtab %}
{% endtabs %}

If this command fails, `npx` will output an `npm install/yarn add` command that you can copy and run manually.

For more information and caveats around this, please read the [installation instructions for this package](https://github.com/chordcommerce/chord-ui/tree/main/packages/gatsby-theme-performance#installation).


---

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