> For the complete documentation index, see [llms.txt](https://docs.keycloakify.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.keycloakify.dev/keycloakify/v9/migration-guides/v8-greater-than-v9.md).

# v8 -> v9

* If it's not already the case you must now use the [`copy-keycloak-resources-to-public` postinstall script](https://github.com/keycloakify/keycloakify-starter/blob/92b20fe74154ef8cf037f4b156eb3b2e5264a074/package.json#L11). (Only in WebPack projects, with Vite it's done automatically by the plugin)!.
* The [`keycloakVersionDefaultAssets`](https://docs.keycloakify.dev/v/v8/build-options#keycloakversiondefaultassets) has been removed in favor of [`loginThemeResourcesFromKeycloakVersion`](/keycloakify/v9/build-options.md#loginthemeresourcesfromkeycloakversion).
* You now must have `mvn` (Maven, `brew install maven`) installed to build your Keycloakify theme. The `bundler` build option has been removed in favor of [doCreateJar](/keycloakify/v9/build-options.md#docreatejar). (Note that Maven is present by default on the GitHub Action runners). If you are building your theme within Docker [here are the instructions](/keycloakify/v9/importing-your-theme-in-keycloak.md#using-docker).
* The [`extraThemeNames`](https://docs.keycloakify.dev/v/v8/build-options#extrathemenames) build option has been removed, if you have theme variant, simply pass an array to the [themeName option](/keycloakify/v9/build-options.md#themename).
* Keycloakify now generates two jars `*.jar` and `retrocompat-*.jar`. [You should update your CI](https://github.com/keycloakify/keycloakify-starter/commit/c9aad1406502ba08c654ade4bfa95bf3a6e93830).
  * If you have no Account theme: You can use the `retrocompat-*.jar`, it will work on any Keycloak version.
  * If you have an Account theme:

    * You should use `retrocompat-*.jar` on any Keycloak version prior to 23. [And select `<your theme>_retrocompat` when selecting in the dropdown when selecting your account theme](https://github.com/keycloakify/keycloakify/assets/6702424/bc0c988a-9fc1-4c45-a37a-fcf98b7096af).
    * You should use `*.jar` on Keycloak 23 and up.

    Be aware that Acount theme does not work in Keycloak 22 (and only in this version).
* If you where loading your theme into your Keycloak by copy pasting the build\_keycloak/src directly into your Keycloak you can still do that with Keycloak prior to 22 or if you don't have an account theme but if you have an account theme and you are on Keycloak 23 you must follow one of the [official instruction for loading the .jar into Keycloak](/keycloakify/v9/importing-your-theme-in-keycloak.md).

\\


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.keycloakify.dev/keycloakify/v9/migration-guides/v8-greater-than-v9.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.