---
title: Configuring Elixir
eleventyNavigation:
  key: Configuring Elixir
  parent: Elixir
---

## Supported versions

| |
| --- |
| 1.13 \| 1.14 \| 1.15 \| 1.16 \| 1.17 \| 1.18 |

The default version can be changed from the administration section, under **Environment > Elixir**. This is the version that is especially used when you start `mix`.

Versions are not necessarily [already installed](/en/docs/web-hosting/languages#versions).

## Binary to use

To force the use of a different version of Elixir other than the default one, define the environment variable `ELIXIR_VERSION`:

```sh
$ ELIXIR_VERSION=1.14 elixir
```

In your scripts, use `/usr/bin/elixir` as *shebang*:

```
#!/usr/bin/elixir
```

## Environment

Your Elixir environment starts off empty, with no ready installed libraries.

## HTTP deployment

To deploy an HTTP application with Elixir, create an *Elixir* type site in the **Web > Sites** section.

![](images/elixir.png)

You need to specify the command that will start your Elixir application, for example:

```
mix /home/[account]/myapp/phx.server
```

> [!WARNING]
> Your application must absolutely listen to IP `::` and the port shown in the site configuration in the *Command* field or use the IP and PORT environment variables.