diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b4430477..6d68745c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,6 +19,9 @@ jobs:
       matrix:
         php-versions: ['7.4']
         typo3-versions: ['^10', '^11']
+        include:
+          - php-versions: 8.0
+            typo3-versions: ^11
     steps:
       - name: Check out repository
         uses: actions/checkout@v2
@@ -42,7 +45,7 @@ jobs:
       - name: Install composer dependencies
         run: |
           composer --version
-          composer require typo3/cms-core=${{ matrix.typo3-versions }} rector/rector=^0.8 --no-progress --prefer-dist --optimize-autoloader
+          composer require typo3/cms-core=${{ matrix.typo3-versions }} --no-progress --prefer-dist --optimize-autoloader
           git checkout composer.json
       - name: Run PHP linter
         run: |
diff --git a/rector.php b/rector.php
index 40da4b72..6155743c 100644
--- a/rector.php
+++ b/rector.php
@@ -5,6 +5,7 @@
 use Rector\Core\Configuration\Option;
 use Rector\Core\ValueObject\PhpVersion;
 use Rector\DeadCode\Rector\Cast\RecastingRemovalRector;
+use Rector\DeadCode\Rector\ClassMethod\RemoveUnusedPromotedPropertyRector;
 use Rector\Php71\Rector\FuncCall\CountOnNullRector;
 use Rector\Php74\Rector\LNumber\AddLiteralSeparatorToNumberRector;
 use Rector\Php74\Rector\Property\TypedPropertyRector;
@@ -64,6 +65,7 @@
         RecastingRemovalRector::class => [
             __DIR__ . '/Tests/Unit/ViewHelpers/ViewHelperTestCase.php',
         ],
+        RemoveUnusedPromotedPropertyRector::class, // to avoid rector warning on PHP8.0 with codebase compatible with PHP7.4
         ReturnTypeDeclarationRector::class => [
             // because psalm complaints about different return types for getType()
             __DIR__ . '/Classes/Core/Model/AbstractType.php',