whatup.gemspec in whatup-0.2.0 vs whatup.gemspec in whatup-0.2.1

@@ -12,9 +12,10 @@
 
   spec.summary       = 'A simple server-based instant messaging application'
   # spec.description   = 'TODO: Write a longer description or delete this line.'
   spec.homepage      = 'https://github.com/jethrodaniel/whatup'
   spec.license       = 'MIT'
+  spec.required_ruby_version = '~> 2.4'
 
   # Prevent pushing this gem to RubyGems.org. To allow pushes either set the
   # 'allowed_push_host' to allow pushing to a single host or delete this
   # section to allow pushing to any host.
   if spec.respond_to?(:metadata)