https://devzone.nordicsemi.com/f/nordic-q-a/75474/how-to-upgrate-bootloaderHi, I want to upgrate bootloader in my firmware. IC: nRF52832 SDK: 17.02 I have finished my project, this project include boot + softdevice + app + settings,and it works well. But I forget to close the key p0.16 in bootloader project. So Ien-USTelligent Community 13Tue, 25 May 2021 09:10:48 GMThttps://devzone.nordicsemi.com/thread/311370?ContentTypeID=1Tue, 25 May 2021 09:10:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:67bd36d1-abf7-44f9-941c-151de3ed81e1Einar Thorsrud<p>Hi,</p> <p>The bootloader can be updates via DFU in the same way as an application. Note that the application will be deleted as part of a bootloader upgrade, so you should also upgrade the application in this case as a secondary step. When making a upgrade package for the bootloader, you use something like this:</p> <p><pre class="ui-code" data-mode="text">pkg generate --hw-version &lt;your_hw_verion&gt; --sd-req &lt;softdevice_id&gt; --bootloader-version &lt;higher_number_than_before&gt; --bootloader bootloader.hex --key-file key.pem bl_dfu_package.zip</pre></p> <p>Then you do the DFU upgrade just like you would with only the app.</p><div style="clear:both;"></div>