keep_up.gemspec in keep_up-0.7.1 vs keep_up.gemspec in keep_up-0.8.0

@@ -22,14 +22,14 @@
 
   spec.bindir        = 'bin'
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 2.3.0'
+  spec.required_ruby_version = '>= 2.4.0'
 
   spec.add_runtime_dependency 'bundler', ['>= 1.15', '< 3.0']
 
   spec.add_development_dependency 'aruba', '~> 0.14.2'
-  spec.add_development_dependency 'rake', '~> 12.0'
+  spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'rspec', '~> 3.0'
-  spec.add_development_dependency 'simplecov', '~> 0.16.1'
+  spec.add_development_dependency 'simplecov', '~> 0.17.0'
 end