# Setting a pyodide runtime
Pyscript will automatically set the runtime for you, but you can also set it manually. This is useful if you want to use a different version than the one set by default.
## Development setup
To get started, let's create a new `index.html` file and import `pyscript.js`.
```html
Runtime
```
We are using the pyodide CDN to setup our runtime, but you can also download the files from [the pyodide GitHub release](https://github.com/pyodide/pyodide/releases/tag/0.22.0a3), unzip them and use the `pyodide.js` file as your runtime.
## Setting the runtime
To set the runtime, you can use the `runtime` configuration in the `py-config` element. In this tutorial, we will use the default `TOML` format, but know that you can also use `json` if you prefer by changing the `type` attribute of the `py-config` element.
```html
Runtime
[[runtimes]]
src = "https://cdn.jsdelivr.net/pyodide/v0.22.0a3/full/pyodide.js"
name = "pyodide-0.22.0a3"
lang = "python"
```
## Confirming the runtime version
To confirm that the runtime is set correctly, you can open the DevTools and check the version from the console. But for the sake of this tutorial, let's create a `py-script` tag and print pyodide's version.
```html
Runtime
[[runtimes]]
src = "https://cdn.jsdelivr.net/pyodide/v0.22.0a3/full/pyodide.js"
name = "pyodide-0.22.0a3"
lang = "python"
import pyodide
print(pyodide.__version__)
```