Bundler could not find compatible versions for gem "activemerchant"

[alvarezloaiciga]

Hi,

I just installed solidus in a new project, I tried to install this gem and got this:

Bundler could not find compatible versions for gem "activemerchant":
  In Gemfile:
    solidus was resolved to 1.0.0, which depends on
      solidus_core (= 1.0.0) was resolved to 1.0.0, which depends on
        activemerchant (~> 1.48.0)

    spree_product_assembly was resolved to 3.0.0, which depends on
      spree_backend (~> 3.0) was resolved to 3.0.0, which depends on
        spree_core (= 3.0.0) was resolved to 3.0.0, which depends on
          activemerchant (~> 1.46.0)