```
python3 -m pip install pypng
python3 -m pip install lz4
```

# pngquant tool

-   Linux (Debian)

    ```
    sudo apt install pngquant
    ```

-   Mac

    ```
    brew install pngquant
    ```

-   Windows

    Download pngquant.exe from https://pngquant.org/ and put it in your PATH.