Gemfile in rbs_rails-0.8.2 vs Gemfile in rbs_rails-0.9.0

@@ -1,9 +1,12 @@
 source "https://rubygems.org"
 
+git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
+
 # Specify your gem's dependencies in rbs_rails.gemspec
 gemspec
 
 gem "rake", "~> 13.0"
-gem 'rbs', '>= 1.0.0'
-gem 'steep', '>= 0.34.0'
+gem 'rails', '< 6.1', '>= 6.0'
+gem 'rbs', '>= 1.6'
+gem 'steep', github: 'soutaro/steep'
 gem 'minitest'