jekyll-toc.gemspec in jekyll-toc-0.9.0.beta1 vs jekyll-toc.gemspec in jekyll-toc-0.9.0.beta2

@@ -13,12 +13,12 @@
   spec.homepage      = 'https://github.com/toshimaru/jekyll-toc'
   spec.license       = 'MIT'
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 2.2.2'
+  spec.required_ruby_version = '>= 2.3'
 
-  spec.add_runtime_dependency 'nokogiri', '~> 1.7'
+  spec.add_runtime_dependency 'nokogiri', '~> 1.8'
 
   spec.add_development_dependency 'appraisal'
   spec.add_development_dependency 'codeclimate-test-reporter', '~> 1.0'
   spec.add_development_dependency 'jekyll', '>= 3.5'
   spec.add_development_dependency 'minitest', '~> 5.0'