attr-gather.gemspec in attr-gather-1.2.0 vs attr-gather.gemspec in attr-gather-1.2.1

@@ -13,9 +13,11 @@
   spec.summary = 'Write a short summary, because RubyGems requires one.'
   spec.description = 'Write a longer description or delete this line.'
   spec.homepage = 'https://github.com/ianks/attr-gather'
   spec.license = 'MIT'
 
+  spec.required_ruby_version = '>= 2.4'
+
   # spec.metadata["allowed_push_host"] = "TODO: Set to 'http://mygemserver.com'"
 
   spec.metadata['homepage_uri'] = spec.homepage
   spec.metadata['source_code_uri'] = 'https://github.com/ianks/attr-gather'
   # spec.metadata["changelog_uri"] = "Put your gem's CHANGELOG.md URL here."