---
title: "Update Amplia from 3.0-3.4 to 3.5"
description: "Update an on-premises Amplia from 3.0-3.4 to 3.5, which moves to ASP.NET Core 3.1 and requires installing its runtime."
canonical: "https://docs.lacunasoftware.com/en-us/articles/amplia/on-premises/update-35"
locale: "en"
product: "Amplia"
last_updated: "2026-07-14"
---

# Update Amplia from 3.0-3.4 to 3.5

> **Note**
>
> If your Amplia instance is on a 2.x version, [update first to 3.0](https://docs.lacunasoftware.com/en-us/articles/amplia/on-premises/update-30)

Now that ASP.NET Core 2.2 is deprecated, version [3.5](https://docs.lacunasoftware.com/en-us/articles/amplia/changelog#v3-5-0) of [Amplia](https://docs.lacunasoftware.com/en-us/articles/amplia) has been migrated to use ASP.NET Core 3.1, which is
the newest LTS release of ASP.NET Core, [to be supported by Microsoft until December 2022](https://dotnet.microsoft.com/platform/support/policy/dotnet-core#lifecycle).

Because of that, to update your [on-premises](https://docs.lacunasoftware.com/en-us/articles/amplia/on-premises) instance, you must install the ASP.NET Core Runtime 3.1.

Please refer to the *Install the ASP.NET Core Runtime 3.1* section of the installation procedure corresponding to your platform:

* [Windows Server](https://docs.lacunasoftware.com/en-us/articles/amplia/on-premises/windows/install#install-aspnet-core)
* Linux
  * [Ubuntu Server](https://docs.lacunasoftware.com/en-us/articles/amplia/on-premises/linux/install-ubuntu#install-aspnet-core)
  * [Red Hat Enterprise Linux](https://docs.lacunasoftware.com/en-us/articles/amplia/on-premises/linux/install-rhel#install-aspnet-core)
  * [Oracle Linux](https://docs.lacunasoftware.com/en-us/articles/amplia/on-premises/linux/install-oracle#install-aspnet-core)

> **Note**
>
> On Docker, there's nothing to do, the new 3.5 image already ships based on the ASP.NET Core 3.1 image

## Azure App Services

If your Amplia instance is hosted on Azure App Services:

1. On the Azure Portal, enter your App Service configuration
1. Click on **Configuration**, then select the **General settings** tab
1. On the *Stack settings* section:
   1. The *Stack* setting should be set to **.NET Core**
   1. If there's a *Major version* setting, set it to **3.1**

> **Tip**
>
> The *Major version* setting is only shown if the App Service Plan is Linux-based. Otherwise, for Windows-based plans, it is not needed
> to change the *major version*.