> For the complete documentation index, see [llms.txt](https://docs.xibosignage.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.xibosignage.com/kb/cms-installation-and-upgrades/self-hosted-cms-upgrades.md).

# Self hosted CMS Upgrades

### Supported Upgrades <a href="#content-supported-upgrades" id="content-supported-upgrades"></a>

Direct upgrades, 1.8.x to the latest version for example are not supported, instead the CMS must be upgraded to the last available release for each major version to ensure the incremental changes are added to your installation.

For example, if you are using a 1.8.6 CMS and want to upgrade to v4.x you will need to upgrade via the following route:

* 1.8.6 to 1.8.13
* 1.8.13 to 2.3.16
* 2.3.16 to 3.3.12
* 3.3.12 to 4.0.15
* 4.0.15 to 4.x

{% hint style="danger" %}
Make a backup of your CMS media library and database before each upgrade is attempted. Once an upgrade is complete, test the CMS to make sure there are no issues before proceeding to the next version upgrade.
{% endhint %}


---

# 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 by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.xibosignage.com/kb/cms-installation-and-upgrades/self-hosted-cms-upgrades.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

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.