diff --git a/.rubocop.yml b/.rubocop.yml
index 63d0f26..555c5c6 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,4 +1,5 @@
 require:
+  - rubocop-packaging
   - rubocop-performance
   - rubocop-rake
   - rubocop-rspec
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a3fe84..e34ebcd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.28.0 / 2023-07-22
+
+* [ENHANCEMENT] Reduce gem size
+
 ## 0.27.0 / 2023-02-14
 
 * [FEATURE] Add Buildkite CI support [#43](https://github.com/tagliala/coveralls-ruby-reborn/pull/43)
diff --git a/Gemfile b/Gemfile
index 2052546..e4cecc5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,13 +6,14 @@ source 'https://rubygems.org'
 gemspec
 
 platforms :jruby do
-  gem 'jruby-openssl', '~> 0.14.1'
+  gem 'jruby-openssl', '~> 0.14.2'
 end
 
 gem 'bundler', '~> 2.0'
 gem 'rake', '~> 13.0'
 gem 'rspec', '~> 3.12'
 gem 'rubocop', '~> 1.50'
+gem 'rubocop-packaging', '~> 0.5.2'
 gem 'rubocop-performance', '~> 1.17'
 gem 'rubocop-rake', '~> 0.6.0'
 gem 'rubocop-rspec', '~> 2.20'
diff --git a/coveralls-ruby.gemspec b/coveralls-ruby.gemspec
index 5490197..7563ed1 100644
--- a/coveralls-ruby.gemspec
+++ b/coveralls-ruby.gemspec
@@ -12,7 +12,7 @@ Gem::Specification.new do |gem|
   gem.homepage      = 'https://coveralls.io'
   gem.license       = 'MIT'
 
-  gem.files         = `git ls-files`.split($OUTPUT_RECORD_SEPARATOR)
+  gem.files         = Dir.glob('{CHANGELOG.md,LICENSE,README.md,lib/**/*.rb,bin/coveralls}', File::FNM_DOTMATCH)
   gem.executables   = gem.files.grep(%r{^bin/}).map { |f| File.basename(f) }
   gem.name          = 'coveralls_reborn'
   gem.require_paths = ['lib']
diff --git a/lib/coveralls/version.rb b/lib/coveralls/version.rb
index 0999082..7fdfb95 100644
--- a/lib/coveralls/version.rb
+++ b/lib/coveralls/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Coveralls
-  VERSION = '0.27.0'
+  VERSION = '0.28.0'
 end