How can I download all photos at once from a publicly shared album?

A client of mine asked their photographer to share photos with me for a website project. The client sent me a link on iCloud https://www.icloud.com/sharedalbum/album_name. Using Safari, I can see the summary page with tiled images, can scroll through all 180 photos, and can click on any image to view full screen. When viewing a single image, I can hit "download" to download this image.

How can I download all photos in this album at once?

Macbook Pro

High Sierra 10.13.1

Safari 11.0.1

Thanks!