`StrictMode` to detect if your `OkHttpClient` is being initialized on the main thread.

 *  Upgrade: [Okio 3.12.0][okio_3_12_0].

 *  Upgrade: [Kotlin 2.1.21][kotlin_2_1_21].

 *  Upgrade: [kotlinx.coroutines 1.10.2][coroutines_1_10_2]. This is used by the optional
    `okhttp-coroutines` artifact.

 *  Upgrade: [AndroidX Startup 1.2.0][startup_1_2_0]. The Android variant of the `okhttp` artifact

    private
    lateinit var selected: String

    private
    var upgrade: String? = null

    internal
    fun configure(components: ComponentMetadataHandler, configurations: ConfigurationContainer) {
        if (upgrade != null) {
            configurations.forceUpgrade(selected, upgrade!!)
        } else {
            providedBy.forEachIndexed { idx, provider ->

////

## Upgrade `pip` { #upgrade-pip }

/// tip

If you use [`uv`](https://github.com/astral-sh/uv) you would use it to install things instead of `pip`, so you don't need to upgrade `pip`. 😎

///

If you are using `pip` to install packages (it comes by default with Python), you should **upgrade** it to the latest version.

You can read it to understand better what has changed.

## Tests { #tests }

Make sure you have [tests](../tutorial/testing.md) for your app and you run them on continuous integration (CI).

This way, you can do the upgrade and make sure everything is still working as expected.

## `bump-pydantic` { #bump-pydantic }

    /// note

    The `--no-cache-dir` is only related to `pip`, it has nothing to do with Docker or containers.

    ///

    The `--upgrade` option tells `pip` to upgrade the packages if they are already installed.

    Because the previous step copying the file could be detected by the **Docker cache**, this step will also **use the Docker cache** when available.

* `upgrade`: Upgrades

///

<details>
<summary>Dockerfile Preview 👀</summary>

```Dockerfile
FROM python:3.14

WORKDIR /code

COPY ./requirements.txt /code/requirements.txt

RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt

COPY ./app /code/app

CMD ["fastapi", "run", "app/main.py", "--port", "80"]

# If running behind a proxy like Nginx or Traefik add --proxy-headers

You will see the alternative automatic documentation (provided by [ReDoc](https://github.com/Rebilly/ReDoc)):

![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="2  7-10 23-25"

    - [Node Binaries](#node-binaries)
    - [Container Images](#container-images)
  - [Changelog since v1.36.0-alpha.2](#changelog-since-v1360-alpha2)
  - [Urgent Upgrade Notes](#urgent-upgrade-notes)
    - [(No, really, you MUST read this before you upgrade)](#no-really-you-must-read-this-before-you-upgrade)
  - [Changes by Kind](#changes-by-kind)
    - [Deprecation](#deprecation)
    - [API Change](#api-change)
    - [Feature](#feature)

### Fixes

* 🎨 Fix types for lifespan, upgrade Starlette to 0.26.1. PR [#9245](https://github.com/tiangolo/fastapi/pull/9245) by [@tiangolo](https://github.com/tiangolo).

## 0.94.0 (2023-03-10)

### Upgrades

* ⬆ Upgrade python-multipart to support 0.0.6. PR [#9212](https://github.com/tiangolo/fastapi/pull/9212) by [@musicinmybrain](https://github.com/musicinmybrain).