> For the complete documentation index, see [llms.txt](https://key4.hideez.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://key4.hideez.com/guide-for-hideez-key/service-operations/firmware-update-through-web.md).

# Firmware update through Web

You can update Firmware on your Hideez Key 4 through the web:

### Web updates through Bluetooth: 

{% hint style="info" %}
This method is compatible with PCs on Windows operating systems. 
{% endhint %}

1. Pair Hideez Key to your PC via Bluetooth.
2. Open the [**Hideez Firmware Update web service.**](https://update.hideez.com/FW_Web_update_app/RELEASE/?advanced=true)
3. Click the button “Update over BLE”.
4. Select your Hideez Key in the window that appears and click **“Connect.”**

<figure><img src="/files/IA3FXgCvOIKp7wCWw3Kc" alt="" width="416"><figcaption></figcaption></figure>

5. Choose “Use currently available version for your device: 4.3.XX” and click **“Start update.”**

<figure><img src="/files/O4juLvSitCuF6tlahii1" alt="" width="551"><figcaption></figcaption></figure>

{% hint style="info" %}
In some cases, you may need to install a specific firmware version. To do this, select "**Load firmware from the file**." Wait for the firmware installation to complete.
{% endhint %}

6. Wait for the firmware installation to complete.

<div><figure><img src="/files/94XgEClZY7qdEoNi6baI" alt=""><figcaption></figcaption></figure> <figure><img src="/files/Ka7e7QVqQ6NYHkeS5AqO" alt=""><figcaption></figcaption></figure></div>

### Web updates through USB:

{% hint style="info" %}
Please note, that updating over USB is possible only with Hideez Key 4 with **Bootloader version 4.4.9:**

{% endhint %}

<figure><img src="/files/3FVm34zbXH5s4wEAQZUF" alt=""><figcaption></figcaption></figure>

#### To update the firmware on your Hideez Key to the latest version, follow these steps:

1. Open the [**Hideez Firmware Update web service.**](https://update.hideez.com/FW_Web_update_app/RELEASE/?advanced=true)
2. Connect your Hideez Key to your computer using a Micro USB port.
3. Select “**Update over USB**.”

<figure><img src="/files/OQSSCvurs79mx49Q3WkO" alt="" width="563"><figcaption></figcaption></figure>

{% hint style="warning" %}
**Please, notice, that you have to use a micro USB cable that supports data transfer not only charging. Otherwise, you can not install firmware.**
{% endhint %}

4. Select your Hideez Key in the window that appears and click **"Connect."**

<figure><img src="/files/IA3FXgCvOIKp7wCWw3Kc" alt="" width="416"><figcaption></figcaption></figure>

5. Choose “Use currently available version for your device: 4.3.XX” and click **“Start update.”**

<figure><img src="/files/O4juLvSitCuF6tlahii1" alt="" width="551"><figcaption></figcaption></figure>

{% hint style="info" %}
In some cases, you may need to install a specific firmware version. To do this, select "**Load firmware from file**." Wait for the firmware installation to complete.
{% endhint %}

6. Wait for the firmware installation to complete.

<div><figure><img src="/files/94XgEClZY7qdEoNi6baI" alt=""><figcaption></figcaption></figure> <figure><img src="/files/Ka7e7QVqQ6NYHkeS5AqO" alt=""><figcaption></figcaption></figure></div>