# Upgrading Telerik UI for ASP.NET Core

This document describes how to upgrade the version of the Telerik UI for ASP.NET Core helpers.

## Upgrading to New Versions

To update Telerik UI for ASP.NET Core to a new version, either:

* [Upgrade with NuGet or Bower](https://www.telerik.com/aspnet-core-ui/documentation/installation/upgrading/upgrade#using-nuget-or-bower).

* [Manually replace the references and files](https://www.telerik.com/aspnet-core-ui/documentation/installation/upgrading/upgrade#upgrading-manually).

### Using NuGet or Bower

To upgrade the version with NuGet or Bower:

1. In Visual Studio, open the NuGet Package Manager and navigate to the **Installed** tab. Click **Update** for the **Telerik.UI.for.AspNet.Core** package.
   * If you use Bower instead of NuGet, open the Bower Package Manager and select the **Installed** tab. Click **Update** for the **kendo-ui** package.
2. In the application, manually replace any references which point to the old Kendo UI [scripts and styles](https://www.telerik.com/aspnet-core-ui/documentation/installation/adding-client-side-resources/getting-started-copy-client-resources).

   * If the scripts and styles are referenced through the Kendo CDN service, update the links with the new version.

     ```HTML _Layout.cshtml
     <link rel="stylesheet" href="https://kendo.cdn.telerik.com/themes/14.6.1/default/default-main.css" />
     <script src="https://code.jquery.com/jquery-3.7.0.min.js"></script>
     <script src="https://kendo.cdn.telerik.com/2026.3.1015/js/kendo.all.min.js"></script>
     <script src="https://kendo.cdn.telerik.com/2026.3.1015/js/kendo.aspnetmvc.min.js"></script>
     ```

   * If the scripts and styles are referenced locally, download the JavaScript and CSS files from the Telerik website and then copying them in your project. For the detailed step-by-step procedure, refer to the [Using Local Files](https://www.telerik.com/aspnet-core-ui/documentation/installation/adding-client-side-resources/using-local-files) article.

> To properly load the Telerik and Kendo UI packages, both [NuGet](https://www.telerik.com/aspnet-core-ui/documentation/installation/installation-options/nuget-install) and [Bower](https://docs.telerik.com/kendo-ui/intro/installation/bower-install#kendo-ui-professional) require authentication.

### Upgrading Manually

1. [Download](https://www.telerik.com/aspnet-core-ui/documentation/installation/installation-options/overview-download#getting-the-binaries) the desired version from the **Download** section of your account.
2. Change the reference to the new `Kendo.MVC` dll. Verify that the dll refers to the correct ASP.NET Core version.
3. In the application, manually replace any references which point to the old Kendo UI [scripts and styles](https://www.telerik.com/aspnet-core-ui/documentation/installation/adding-client-side-resources/getting-started-copy-client-resources).

   * If the scripts and styles are referenced through the Kendo CDN service, update the links with the new version.

     ```HTML _Layout.cshtml
     <link rel="stylesheet" href="https://kendo.cdn.telerik.com/themes/14.6.1/default/default-main.css" />
     <script src="https://code.jquery.com/jquery-3.7.0.min.js"></script>
     <script src="https://kendo.cdn.telerik.com/2026.3.1015/js/kendo.all.min.js"></script>
     <script src="https://kendo.cdn.telerik.com/2026.3.1015/js/kendo.aspnetmvc.min.js"></script>
     ```

   * If the scripts and styles are referenced locally, download the JavaScript and CSS files from the Telerik website and then copying them in your project. For the detailed step-by-step procedure, refer to the [Using Local Files](https://www.telerik.com/aspnet-core-ui/documentation/installation/adding-client-side-resources/using-local-files) article.

> The installed Telerik UI for ASP.NET Core NuGet package and the required [client-side assets](https://www.telerik.com/aspnet-core-ui/documentation/installation/adding-client-side-resources/getting-started-copy-client-resources) must have identical versions.

## Switching to a Developer License \[Deprecated]

> Starting with version 2025 Q3, the Trial package is deprecated, and the toolset is available only with a Developer License.

1. After the purchase of a Developer License, follow the [Update your license key](https://www.telerik.com/aspnet-core-ui/documentation/installation/activating-your-license/setting-up-your-license#license-key-updates) guidelines.
2. To upgrade to the latest product version, follow the steps for [updating the Telerik UI for ASP.NET Core version](https://www.telerik.com/aspnet-core-ui/documentation/installation/upgrading/upgrade#upgrading-to-new-versions).

If you still see the Trial message after you switch to a developer (commercial) license, check the [troubleshooting knowledge base article](https://www.telerik.com/aspnet-core-ui/documentation/knowledge-base/trial-to-commercial-license-troubleshooting).

## See Also

* [Upgrade Troubleshooting](https://www.telerik.com/aspnet-core-ui/documentation/installation/upgrading/upgrade-troubleshooting)

* [Telerik UI for ASP.NET Core Download and Installation](https://www.telerik.com/aspnet-core-ui/documentation/installation/installation-options/overview-download)

* [Downloading New Versions of Telerik UI for ASP.NET Core](https://www.telerik.com/aspnet-core-ui/documentation/vs-integration/latest-version-retrieval).