diff --git a/simplecov.gemspec b/simplecov.gemspec
index af123988..712c2d2d 100644
--- a/simplecov.gemspec
+++ b/simplecov.gemspec
@@ -22,8 +22,6 @@ Gem::Specification.new do |gem|
 
   gem.add_development_dependency "bundler", "~> 1.9"
 
-  gem.files         = `git ls-files`.split("\n") - %w[cucumber.yml]
-  gem.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
-  gem.executables   = `git ls-files -- bin/*`.split("\n").map { |f| File.basename(f) }
+  gem.files         = Dir["{lib}/**/*.*", "bin/*", "LICENSE", "*.md", "doc/*"]
   gem.require_paths = ["lib"]
 end