diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e5678c9..d4fc6c3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,6 +30,12 @@ jobs:
         gem install bundler --no-document
         bundle install --jobs 4 --retry 3
         bundle exec rake
+
+    - name: Coveralls
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+
   lint:
     runs-on: ubuntu-latest
     name: Rubocop lint
diff --git a/Gemfile b/Gemfile
index cc2712c..8354250 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,3 +8,5 @@ gemspec
 gem 'pry'
 gem 'rubocop'
 gem 'rubocop-performance'
+gem 'simplecov'
+gem 'simplecov-lcov'
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index eb7db70..eba7185 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -2,6 +2,17 @@
 
 require 'rspec'
 require 'webmock/rspec'
+require 'simplecov'
+require 'simplecov-lcov'
+
+SimpleCov::Formatter::LcovFormatter.config.report_with_single_file = true
+SimpleCov.formatter = SimpleCov::Formatter::LcovFormatter
+SimpleCov::Formatter::LcovFormatter.config do |c|
+  c.output_directory = 'coverage'
+  c.lcov_file_name = 'lcov.info'
+  c.single_report_path = 'coverage/lcov.info'
+end
+SimpleCov.start
 
 require File.expand_path('../lib/sonarqube', __dir__)