ladder_drive.gemspec in ladder_drive-0.6.3 vs ladder_drive.gemspec in ladder_drive-0.6.4

@@ -20,9 +20,10 @@
   spec.add_runtime_dependency 'pi_piper', '~> 2.0', '>= 2.0.0'
   spec.add_runtime_dependency 'serialport'
   spec.add_runtime_dependency 'google_drive', '~> 3.0'
   spec.add_runtime_dependency 'ruby-trello', '~>2.1'
 
+  spec.required_ruby_version = '>= 2.3.3'
 
   spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]