doc

README.md

@@ -337,15 +337,15 @@ The MIT License (MIT). Please see [License File](LICENSE.md) for more informatio
 
 [<img src="https://user-images.githubusercontent.com/48261459/201463225-0a5a084e-df15-4b11-b1d2-40fafd3555cf.svg" height="120rem" width="100%" />](https://github.com/kiwilan)
 
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 [version-href]: https://packagist.org/packages/kiwilan/php-ebook
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+[license-src]: https://img.shields.io/github/license/kiwilan/php-ebook.svg?style=flat&colorA=18181B&colorB=777BB4
 [license-href]: https://github.com/kiwilan/php-ebook/blob/main/README.md
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 [codecov-href]: https://codecov.io/gh/kiwilan/php-ebook