Hashie warning "You are setting a key that conflicts with a built-in method"

Hashie 3.5.5
Grape 0.19.2

To reproduce:

require "grape"

class MyAPI < Grape::API
  params do
    requires :update, type: Boolean
  end
  get "hoge" do
    "update = #{params[:update]}"
  end
end

run MyAPI

Log:

W, [2017-06-06T14:18:35.531821 #46633]  WARN -- : You are setting a key that conflicts with a built-in method Hashie::Mash#update defined at /Users/val00362/tmp/grapetest/vendor/bundle/ruby/2.3.0/gems/hashie-3.5.5/lib/hashie/mash.rb:209. This can cause unexpected behavior when accessing the key via as a property. You can still access the key via the #[] method.

Hashie::Mash has built-in update method. It's conflicting with my parameter name. Similarly, you would see the warning when you used any of Hashie::Mash's 280+ methods. Is there any workaround about this? Or at least, some caveat to avoid these parameter names should be written in the README.

Run the supplied Grape API example with the reported Hashie 3.5.5 and Ruby versions to reproduce the warning. Inspect Hashie::Mash and the referenced hashie/mash.rb location, then review the README for guidance on conflicting parameter names. Done means providing a verified workaround or documenting the relevant caveat.