# New License Key Format

_March 16, 2023_

> **⚠️ Warning**
>
> This release note is more than two years old and may no longer reflect
> current behavior. View the
> [latest release notes](/minfraud/release-notes/).

We have updated the format of our license keys. New license keys will be longer,
with a six character prefix.

The new license keys can be used in all current versions of our Client APIs and
in version 3.1.1 and higher of
[our GeoIP Update program](/geoip/updating-databases).

No action is required for minFraud users. Existing license keys will still be
valid and will continue to function normally.

New license keys will have the following changes:

- The character set is changing from `[a-zA-Z0-9]` to `[a-zA-Z0-9_]`.
- The length of the license key will now be 40 characters.
- License keys will have a `_mmk` suffix.

Please note that the length of license keys may be increased in the future.