diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 21eda56..608cbd0 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -1,19 +1,17 @@
+---
 name: CI
-
 on:
   push:
   pull_request:
   schedule:
-  - cron: '0 0 * * *'
+  - cron: 0 0 * * *
   workflow_dispatch:
-
 jobs:
   ci:
     runs-on: ubuntu-latest
     strategy:
       matrix:
         ruby-version:
-        - '2.7'
         - '3.0'
     services:
       postgres:
@@ -22,13 +20,14 @@ jobs:
           POSTGRESQL_USER: root
           POSTGRESQL_PASSWORD: smartvm
           POSTGRESQL_DATABASE: vmdb_test
-        options: --health-cmd pg_isready --health-interval 2s --health-timeout 5s --health-retries 5
+        options: "--health-cmd pg_isready --health-interval 2s --health-timeout 5s
+          --health-retries 5"
         ports:
         - 5432:5432
     env:
       PGHOST: localhost
       PGPASSWORD: smartvm
-      CC_TEST_REPORTER_ID: ${{ secrets.CC_TEST_REPORTER_ID }}
+      CC_TEST_REPORTER_ID: "${{ secrets.CC_TEST_REPORTER_ID }}"
     steps:
     - uses: actions/checkout@v4
     - name: Set up system
@@ -36,7 +35,7 @@ jobs:
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: ${{ matrix.ruby-version }}
+        ruby-version: "${{ matrix.ruby-version }}"
         bundler-cache: true
       timeout-minutes: 30
     - name: Prepare tests
@@ -44,6 +43,6 @@ jobs:
     - name: Run tests
       run: bundle exec rake
     - name: Report code coverage
-      if: ${{ github.ref == 'refs/heads/master' && matrix.ruby-version == '3.0' }}
+      if: "${{ github.ref == 'refs/heads/master' && matrix.ruby-version == '3.0' }}"
       continue-on-error: true
       uses: paambaati/codeclimate-action@v5