This way, in case there was a breaking change for your code in one of the releases, you can still benefit from the previous upgrades. ✨

### Breaking Changes - Upgrade

* ⬆️ Upgrade Starlette to 0.16.0. PR [#4016](https://github.com/tiangolo/fastapi/pull/4016) by [@tiangolo](https://github.com/tiangolo).

Also upgrades the ranges of optional dependencies:

* `"jinja2 >=2.11.2,<4.0.0"`
* `"itsdangerous >=1.1.0,<3.0.0"`

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

## Example upgrade { #example-upgrade }

Now modify the file `main.py` to receive a body from a `PUT` request.

Declare the body using standard Python types, thanks to Pydantic.

```Python hl_lines="4  9-12  25-27"

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

## Beispielaktualisierung { #example-upgrade }

Ändern Sie jetzt die Datei `main.py`, um den <abbr title="Body – Körper, Inhalt: Der eigentliche Inhalt einer Nachricht, nicht die Metadaten">Body</abbr> eines `PUT`-Requests zu empfangen.

* «to commit»: «committen»
* «to deploy» (in the cloud): «deployen»
* «to modify»: «ändern»
* «to serve» (an application): «bereitstellen»
* «to serve» (a response): «ausliefern»
* «to serve»: NOT «bedienen»
* «to upgrade»: «aktualisieren»
* «to wrap»: «wrappen»
* «to wrap»: NOT «hüllen»
* «`foo` as a `type`»: «`foo` vom Typ `type`»
* «`foo` as a `type`»: «`foo`, ein `type`»
* «FastAPI's X»: «FastAPIs X»

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

## Example upgrade

Now modify the file `main.py` to receive a body from a `PUT` request.

Declare the body using standard Python types, thanks to Pydantic.

```Python hl_lines="4  9-12  25-27"
from typing import Union