Shopify/active_merchant — comment on commit e11c1102672459edbacba7d36f53727f6309c1e7
File:  line 0
By rubys:

Note: this release will not work on the upcoming Rails 4.0 master:

http://intertwingly.net/projects/AWDwR4/checkdepot-193-40/section-26.1.html

The problem is that 'active_support/base64' is deprecated in Rails 3.2 and eliminated in Rails 4.0:

https://github.com/Shopify/active_merchant/blob/master/lib/active_merchant.rb#L33

I see a pull request with a potential fix:

https://github.com/Shopify/active_merchant/pull/245