createsend.gemspec in createsend-6.1.0 vs createsend.gemspec in createsend-6.1.1

@@ -3,11 +3,11 @@
 
 require File.expand_path('lib/createsend/version')
 
 Gem::Specification.new do |s|
   s.add_runtime_dependency 'json', '>= 1.0'
-  s.add_runtime_dependency 'hashie', '~> 3.0'
+  s.add_runtime_dependency 'hashie', '>= 3.0', '< 6'
   s.add_runtime_dependency 'httparty', '~> 0.14'
   s.add_development_dependency 'rake', '~> 12.3.3'
   s.add_development_dependency 'fakeweb', '~> 1.3'
   s.add_development_dependency 'jnunemaker-matchy', '~> 0.4'
   s.add_development_dependency 'shoulda-context', '~> 1.2'
@@ -25,7 +25,8 @@
   s.summary = %q{A library which implements the complete functionality of the Campaign Monitor API.}
   s.test_files = `git ls-files -- {test,spec,features}/*`.split("\n")
   s.version = CreateSend::VERSION
   s.platform = Gem::Platform::RUBY
   s.required_rubygems_version = Gem::Requirement.new('>= 1.3.6') if s.respond_to? :required_rubygems_version=
+  s.required_ruby_version = ">=2.0"
   s.licenses = ['MIT']
 end