diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index fa6a47f..49eb21f 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -1,101 +1,100 @@
 name: Github Testing
 on: [push]
 
+permissions:
+  contents: read
+  id-token: write
 
 jobs:
+  bundle_audit:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 3.2.2
+          bundler-cache: true
+      - name: config bundler
+        run: |
+          bundle config set without 'development staging production'
+          bundle config set deployment 'true'
+          bundle env
+          head -n1 $(which bundle)
+      - name: Install bundle-audit
+        run: gem install bundle-audit
+      - name: Bundle Audit Check
+        run: gem exec bundle-audit check --update
+
   test:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-20.04]
-        ruby: [ 2.7 ]
+        os: [ubuntu-24.04]
+        ruby: ['3.2.2']
     runs-on: ${{ matrix.os }}
-    continue-on-error: ${{ endsWith(matrix.ruby, 'head') || matrix.ruby == 'debug' }}
-    steps:
+    env:
+      RAILS_ENV: test
+      COVERAGE: true
+      DISABLE_SPRING: 1
 
-    - uses: actions/checkout@v4
-    - uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: ${{ matrix.ruby }}
-        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
-    - name: config bundler
-      run:  |
-        bundle config set without 'development staging production'
-        bundle config set deployment '[secure]'
-        bundle env
-        head -n1 $(which bundle)
+    steps:
+      - uses: actions/checkout@v4
 
-    - name: Set ENV for codeclimate (pull_request)
-      run: |
-          git fetch --no-tags --prune --depth=1 origin +refs/heads/$GITHUB_HEAD_REF:refs/remotes/origin/$GITHUB_HEAD_REF
-          echo "GIT_BRANCH=$GITHUB_HEAD_REF" >> $GITHUB_ENV
-          echo "GIT_COMMIT_SHA=$(git rev-parse origin/$GITHUB_HEAD_REF)" >> $GITHUB_ENV
-      if: github.event_name == 'pull_request'
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
 
-    - name: Set ENV for codeclimate (push)
-      run: |
-          echo "GIT_BRANCH=$GITHUB_REF" >> $GITHUB_ENV
-          echo "GIT_COMMIT_SHA=$GITHUB_SHA" >> $GITHUB_ENV
-      if: github.event_name == 'push'
+      - name: config bundler
+        run: |
+          bundle config set without 'development staging production'
+          bundle config set deployment 'true'
+          bundle env
+          head -n1 $(which bundle)
 
-    - name: Prepare CodeClimate
-      env:
-        CC_TEST_REPORTER_ID: ${{ secrets.CC_TEST_REPORTER_ID }}
-      run: |
-        curl -LSs 'https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64' >./cc-test-reporter;
-        chmod +x ./cc-test-reporter
-        ./cc-test-reporter before-build
+      - name: Install dependencies
+        run: |
+          gem install bundler -v '>= 2.2.10'
+          gem install builder
+          gem install nokogiri -v '~> 1.11.3'
+          gem install savon
+          gem install webmock
+          gem install mocha
+          gem install minitest -v '~> 5.14'
+          gem install simplecov -v '<= 0.17.1'
+          bundle install
 
-    - name: Run Tests
-      env:
-        RAILS_ENV: test
-        COVERAGE: true
-        DISABLE_SPRING: 1
-      run: |
-        gem install bundler -v '>= 2.2.10'
-        gem install simplecov -v '<= 0.17.1'
-        gem install builder
-        gem install nokogiri -v '~> 1.11.3'
-        gem install savon
-        gem install webmock
-        gem install mocha
-        gem install minitest -v '~> 5.14'
-        bundle install
-        rake
-    - name: Save coverage
-      run: ./cc-test-reporter format-coverage --output coverage/codeclimate.${{ matrix.ruby }}.json
+      - name: Run Tests
+        run: rake
 
-    - uses: actions/upload-artifact@v3.1.3
-      with:
-        name: coverage-${{ matrix.ruby }}
-        path: coverage/codeclimate.${{ matrix.ruby }}.json
+      - name: Setup qlty.sh
+        run: |
+          curl -sSL https://qlty.sh/install.sh | bash
+          export PATH="$HOME/.qlty/bin:$PATH"
+          qlty --version
 
-  upload_coverage:
-    strategy:
-      matrix:
-        os: [ ubuntu-20.04 ]
-        ruby: [ '2.7' ]
-    runs-on: ubuntu-20.04
-    env:
-      CC_TEST_REPORTER_ID: ${{ secrets.CC_TEST_REPORTER_ID }}
-      CC_TEST_REPORTER_URL: https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64
+      - name: Initialize qlty.sh
+        run: |
+          export PATH="$HOME/.qlty/bin:$PATH"
+          qlty init --no
 
-    needs: test
+      - name: Run qlty.sh analysis
+        run: |
+          export PATH="$HOME/.qlty/bin:$PATH"
+          qlty check
 
-    steps:
-      - name: Download test coverage reporter
-        run: curl -L $CC_TEST_REPORTER_URL > cc-test-reporter
+      - name: Upload coverage to qlty.sh
+        uses: qltysh/qlty-action/coverage@v1
+        with:
+          oidc: true
+          files: coverage/.resultset.json
 
-      - name: Give test coverage reporter executable permissions
-        run: chmod +x cc-test-reporter
+      - uses: actions/upload-artifact@v4
+        with:
+          name: qlty-report-${{ matrix.ruby }}
+          path: qlty-report.json
 
-      - uses: actions/download-artifact@v3.0.2
+      - uses: actions/upload-artifact@v4
         with:
           name: coverage-${{ matrix.ruby }}
-          path: coverage
-
-      - name: Aggregate & upload results to Code Climate
-        run: |
-          ./cc-test-reporter sum-coverage coverage/codeclimate.*.json
-          ./cc-test-reporter upload-coverage
-
+          path: coverage/
diff --git a/.qlty.yml b/.qlty.yml
new file mode 100644
index 0000000..5305ab8
--- /dev/null
+++ b/.qlty.yml
@@ -0,0 +1,44 @@
+version: "1.0"
+languages:
+  - ruby
+
+# RuboCop configuration
+rubocop:
+  enabled: true
+  config_file: "https://raw.githubusercontent.com/internetee/style-guide/master/ruby/.rubocop.yml"
+  version: "~> 1.0"
+
+# Duplication detection
+duplication:
+  enabled: true
+  threshold: 5
+  languages:
+    - ruby
+
+# Exclude patterns
+exclude_patterns:
+  - "bin/"
+  - "test/"
+  - "vendor/"
+  - "node_modules/"
+  - "*.gem"
+
+# Additional quality checks
+checks:
+  - name: "method_length"
+    enabled: true
+    max_length: 20
+  
+  - name: "class_length"
+    enabled: true
+    max_length: 150
+  
+  - name: "cyclomatic_complexity"
+    enabled: true
+    max_complexity: 10
+
+# Output configuration
+output:
+  format: "json"
+  file: "qlty-report.json"
+  console: true
diff --git a/.simplecov b/.simplecov
index 7b9150e..232133e 100644
--- a/.simplecov
+++ b/.simplecov
@@ -1,3 +1,6 @@
-SimpleCov.start do
-  add_filter '/test/'
+if ENV['COVERAGE']
+  require 'simplecov'
+  SimpleCov.start do
+    add_filter '/test/'
+  end
 end
\ No newline at end of file
diff --git a/test/test_helper.rb b/test/test_helper.rb
index e6c27d4..cc5b0e1 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,8 +1,4 @@
-if ENV['COVERAGE']
-  require 'simplecov'
-  SimpleCov.start
-end
-
+# SimpleCov is configured in .simplecov file
 $LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
 require 'e_invoice'
 require 'minitest/autorun'