acme-client.gemspec in acme-client-0.2.0 vs acme-client.gemspec in acme-client-0.2.1

@@ -20,8 +20,7 @@
   spec.add_development_dependency 'rspec', '~> 3.3', '>= 3.3.0'
   spec.add_development_dependency 'vcr', '~> 2.9', '>= 2.9.3'
   spec.add_development_dependency 'webmock', '~> 1.21', '>= 1.21.0'
 
   spec.add_runtime_dependency 'faraday', '~> 0.9', '>= 0.9.1'
-  spec.add_runtime_dependency 'url_safe_base64', '~> 0.2', '>= 0.2.2'
   spec.add_runtime_dependency 'json-jwt', '~> 1.2', '>= 1.2.3'
 end