Gemfile in cards_lib-0.2.4 vs Gemfile in cards_lib-0.2.5

@@ -4,9 +4,13 @@
 gemspec
 gem "codeclimate-test-reporter", group: :test, require: nil
 group :development do
   gem "guard"
   gem "guard-minitest"
+  gem "guard-rubocop"
 end
-if Gem::Dependency.new('', ">= 2.4.0").match?('', RUBY_VERSION)
+
+if Gem::Dependency.new('', "~> 2.4.0").match?('', RUBY_VERSION)
   gem "json", git: 'https://github.com/flori/json', branch: 'v1.8'
+else
+  gem "json"
 end