acme-client.gemspec in acme-client-2.0.14 vs acme-client.gemspec in acme-client-2.0.15

@@ -9,10 +9,10 @@
   spec.email         = ['[e-mail]']
   spec.summary       = 'Client for the ACME protocol.'
   spec.homepage      = 'http://github.com/unixcharles/acme-client'
   spec.license       = 'MIT'
 
-  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
+  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) || f.start_with?('.') }
   spec.require_paths = ['lib']
 
   spec.required_ruby_version = '>= 2.3.0'
 
   spec.add_development_dependency 'bundler', '>= 1.17.3'