yoti.gemspec in yoti-1.2.1 vs yoti.gemspec in yoti-1.3.0

@@ -19,12 +19,13 @@
   spec.license       = 'MIT'
 
   spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features|examples)/}) }
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 2'
+  spec.required_ruby_version = '>= 2.4'
 
   spec.add_dependency 'protobuf', '~> 3.6'
+  spec.add_dependency 'google-protobuf', '~> 3.6.1'
 
   spec.add_development_dependency 'bundler', '~> 1.13'
   spec.add_development_dependency 'dotenv', '~> 2.2'
   spec.add_development_dependency 'generator_spec', '~> 0.9'
   spec.add_development_dependency 'rake', '~> 12.0'