## [1.7.2](https://github.com/jtescher/image_optimizer/releases/tag/v1.7.2) 2018-01-10
* Added quiet option support for pngquant optimizer - https://github.com/jtescher/image_optimizer/pull/19

## [1.7.1](https://github.com/jtescher/image_optimizer/releases/tag/v1.7.1) 2017-11-29
* Fix PNGQuantOptimizer `Unrecognised option` error - https://github.com/jtescher/image_optimizer/issues/17