diff --git a/logger.gemspec b/logger.gemspec
index 09d9600..d8ffba0 100644
--- a/logger.gemspec
+++ b/logger.gemspec
@@ -17,9 +17,12 @@ Gem::Specification.new do |spec|
 
   # 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('..', __FILE__)) do
-    `git ls-files -z 2>#{IO::NULL}`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
-  end
+  pattern = %W[
+    :(glob,top)* :/exe :/ext :/lib
+    :^/.git* :^/Gemfile* :^/Rakefile*
+    :(literal,top,exclude)#{File.basename(__FILE__)}
+  ]
+  spec.files = IO.popen(%w[git ls-files -z] + pattern, chdir: __dir__, &:read).split("\0")
   spec.require_paths = ["lib"]
 
   spec.required_ruby_version = ">= 2.5.0"