When the "solidus_klarna_payment gem" install in solidus app

[nexondevs]

When I run this command bundle install I got this issue

solidus_klarna_payments-0.1.1 requires ruby version ~> 2.5, which is incompatible with the current version, ruby 3.0.0p0

My gem file:

gem 'pg'
ruby '3.0.0'
gem 'puma', '~> 5.0'
gem 'sass-rails', '>= 6'
gem 'turbolinks', '~> 5'
gem 'jbuilder', '~> 2.7'
gem 'webpacker', '~> 5.0'
gem 'rails', '~> 6.1.4', '>= 6.1.4.4'
gem 'bootsnap', '>= 1.4.4', require: false
gem 'solidus', github: 'solidusio/solidus'
gem 'solidus_auth_devise'
gem 'solidus_paypal_commerce_platform'
gem 'solidus_klarna_payments', github: 'solidusio-contrib/solidus_klarna_payments'

Note:
if remove the github: 'solidusio-contrib/solidus_klarna_payments in Gemfle then bundle install successfully but when I run generator command bin/rails generate 'solidus_klarna_payments:install' then they show this error.