fusuma-plugin-wmctrl.gemspec in fusuma-plugin-wmctrl-0.4.3 vs fusuma-plugin-wmctrl.gemspec in fusuma-plugin-wmctrl-1.0.0

@@ -20,8 +20,9 @@
   spec.test_files     = Dir['{test,spec,features}/**/*']
   spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 2.3' # https://packages.ubuntu.com/search?keywords=ruby&searchon=names&exact=1&suite=all&section=main
+  spec.required_ruby_version = '>= 2.5.1' # https://packages.ubuntu.com/search?keywords=ruby&searchon=names&exact=1&suite=all&section=main
+  # support bionic (18.04LTS) 2.5.1
   spec.add_dependency 'fusuma', '~> 2.0.0'
 end