# CDN Naming Convention Change

## Environment

<table>
 <tr>
  <td>Product</td>
  <td>Telerik UI for ASP.NET Core</td>
 </tr>
 <tr>
  <td>Progress Telerik UI for ASP.NET Core version</td>
  <td>2023.1.314</td>
 </tr>
</table>

## Description

I was using the following Kendo JS and CSS links before upgrading Telerik UI for ASP.NET Core:

```
    https://cdn.jsdelivr.net/npm/@progress/kendo-ui@2022.2.802/css/web/kendo.bootstrap-main.min.css
```

However, as of the latest `R1 2023 SP1` release, these resources seem to be obsolete. How can I reference the themes from jsDelivr?

## Solution

As of version `R1 2023 SP1`, the themes are available as npm packages through jsDelivr. A theme URL identifies:

* Theme version—for example, `7.0.2`.
* Theme name—for example, `default`, `bootstrap`, `material`, and so on.
* File name—is the name of the theme.

The following example shows a jsDelivr URL for the Bootstrap theme:

```
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@progress/kendo-theme-bootstrap@7.0.2/dist/all.css" />
```

## See Also

* [Upgrade Troubleshooting](https://www.telerik.com/aspnet-core-ui/documentation/installation/upgrading/upgrade-troubleshooting)
* [Telerik UI for ASP.NET Core Breaking Changes](https://www.telerik.com/aspnet-core-ui/documentation/backwards-compatibility/2023-backwards-compatibility)
* [Telerik UI for ASP.NET Core Knowledge Base](https://docs.telerik.com/aspnet-core/knowledge-base)