[](https://php.package.health/packages/fale/isbn/3.x-dev)
No required dependencies.
1 total, 1 outdated
| Package | Required | Latest | Status | |
|---|---|---|---|---|
| phpunit/phpunit | The PHP Unit Testing framework. | ^4.8 || ^5.7 || ^6.5 || ^7.5 | 13.1.1 | outdated |