# Over-the-Air Upgrade

Shark Jack Cable users may conveniently upgrade their device's firmware by running the `UPDATE_FIRMWARE` command.

1. Plug the Shark Jack Cable into a network which provides Internet access via DHCP
2. Flip the Shark Jack Cable switch to Arming Mode
3. Power the Shark Jack Cable via USB-C from a compatible computer or smartphone
4. From the computer or smartphone, access the Shark Jack shell via Serial
5. Press ENTER to activate the serial console
6. From the `root@shark:~#` prompt, type `UPDATE_FIRMWARE` and press ENTER

If the Shark Jack Cable has Internet access and an update is available, it will download and install automatically.

To cancel the installation, press `CTRL+C` during the 10 second countdown period.

{% hint style="info" %}
If the update fails with an SSL certificate error, verify that the device has the correct date and time with the `date` command, and if necessary rectify this with an NTP update manually using the command `ntpd -q -p 1.openwrt.pool.ntp.org`
{% endhint %}

{% hint style="danger" %}
DO NOT UNPLUG THE SHARK JACK CABLE DURING THE FIRMWARE INSTALL PROCESS. This process will require 5-10 minutes. Powering off the Shark Jack Cable at this time will result in damage to the device that may render it inoperable.
{% endhint %}