diff --git a/confg.gemspec b/confg.gemspec
index 064a6b2..b912a77 100644
--- a/confg.gemspec
+++ b/confg.gemspec
@@ -15,14 +15,13 @@ Gem::Specification.new do |spec|
   spec.license       = "MIT"
 
   # Specify which files should be added to the gem when it is released.
-  # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
-  spec.files = Dir.chdir(File.expand_path(__dir__)) do
-    `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test)/}) }
-  end
+  spec.files = Dir["lib/**/*"] + Dir["*.gemspec"]
+
   spec.executables   = spec.files.grep(%r{^bin/}).map { |f| File.basename(f) }
-  spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
+  spec.metadata["allowed_push_host"] = "https://rubygems.org"
+
   spec.add_development_dependency "bundler"
   spec.add_development_dependency "byebug"
   spec.add_development_dependency "minitest", "~> 5.0"