---
title: App maintenance
category: reference
---

# App maintenance

This reference describes the requirements for submitting updates to a published device app or plugin on Ledger Wallet. Third-party developers are responsible for all updates following the initial release.

## Requirements

### Required deliverables

Every update must be submitted alongside the following:

| Deliverable      | Description                                                                                    |
| ---------------- | ---------------------------------------------------------------------------------------------- |
| Functional tests | Tests covering all APDU commands and UI flows affected by the changes                          |
| Security audit   | A [security audit](./deliverables/security-audit) scoped to the changes in the updated version |

### Submission forms

Updates are submitted via a dedicated form. Only the sections of the app that have changed need to be selected.

| Update type | Form                                                          |
| ----------- | ------------------------------------------------------------- |
| Device app  | [Device app update form](./submission-form)                   |
| Plugin      | [Plugin update form](https://ledger.typeform.com/to/YZZCHEB8) |

### Timeline

**Constraint:** Updates must be submitted at least one month before the desired release date. Ledger must be informed as early as possible.

## Further reading

- [Security audit](./deliverables/security-audit) — scope and requirements for the security audit deliverable
- [Development requirements](../integration/requirements/development) — CI workflow checks required before submission
- [Security requirements](../integration/requirements/security) — security constraints that apply to app updates