protonbot.gemspec in protonbot-0.1.3 vs protonbot.gemspec in protonbot-0.2.0

@@ -19,9 +19,11 @@
   end
   spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
+  spec.required_ruby_version = '>= 2.3.0'
+
   spec.add_development_dependency 'bundler', '~> 1.13'
   spec.add_development_dependency 'rake', '~> 10.0'
   spec.add_development_dependency 'rubocop', '~> 0.47'
 
   spec.add_runtime_dependency 'pastel', '~> 0.7.1'