---
title: "Updating B9S"
---

{% include toc title="Table of Contents" %}

### Required Reading

This page is for existing boot9strap users to update their installation of boot9strap to the latest version.

{% capture notice-1 %}
While we believe custom firmware is relatively safe at this time, it is important to note that it will never be "ban free".

You should avoid the following actions:
1. Piracy
1. Cheating online
1. Suspicious behaviour on eShop (for example, credit card chargebacks)

We believe SpotPass and StreetPass are also safe for use at this time.

{% endcapture %}

<div class="notice--danger">{{ notice-1 | markdownify }}</div>

### What You Need

* The latest release of [SafeB9SInstaller](https://github.com/d0k3/SafeB9SInstaller/releases/latest)
* The latest release of [boot9strap](https://github.com/SciresM/boot9strap/releases/latest) *(standard boot9strap; not the `devkit` file, not the `ntr` file)*
* The latest release of [Luma3DS](https://github.com/AuroraWright/Luma3DS/releases/latest)
* The latest release of [the Homebrew Launcher](https://github.com/fincs/new-hbmenu/releases/latest)

### Instructions

#### Section I - Prep Work

For all steps in this section, overwrite any existing files on your SD card.
{: .notice--info}

1. パソコンにSDカードを入れます
1. Copy `boot.3dsx` to the root of your SD card
1. Create a folder named `boot9strap` on the root of your SD card
1. Copy `boot9strap.firm` and `boot9strap.firm.sha` from the boot9strap `.zip` to the `/boot9strap/` folder on your SD card
1. Copy `SafeB9SInstaller.firm` from the SafeB9SInstaller `.zip` to the `/luma/payloads/` folder on your SD card
1. Reinsert your SD card into your device

#### Section II - Installing boot9strap

1. Launch Luma3DS chainloader menu by holding (Start) during boot
1. Launch SafeB9SInstaller by pressing (A)
1. Wait for all safety checks to complete
1. When prompted, input the key combo given to install boot9strap
1. Once it has completed, hold (Start) while pressing (A) to reboot your device to the Luma3DS chainloader
  + If you encounter an `argc = 0` error booting your device after the B9S update, just continue to fix it

#### Section III - Update Luma3DS

1. Power off your device
1. パソコンにSDカードを入れます
1. Copy `boot.firm` from the Luma3DS `.zip` to the root of your SD card, replacing the existing file
1. Reinsert your SD card into your device
1. Power on your device

#### Section IV - Configuring Luma3DS

This section is only needed if you are prompted with the Luma3DS configuration menu after the reboot.
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1. In the Luma3DS configuration menu, use the (A) button and the D-Pad to turn on the following:    
  + **「Show NAND or user string in System Settings」**
1. (Start) を押してセーブして再起動します

___

### Continue to [Finalizing Setup](finalizing-setup)
{: .notice--primary}