diff --git a/.github/workflows/code_coverage.yaml b/.github/workflows/code_coverage.yaml
index dfb1b38..cb3d7d1 100644
--- a/.github/workflows/code_coverage.yaml
+++ b/.github/workflows/code_coverage.yaml
@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: shivammathur/setup-php@master
         with:
-          php-version: 8.3
+          php-version: 8.4
           coverage: xdebug
       - name: Load dependencies from cache
         id: composer-cache
@@ -23,9 +23,9 @@ jobs:
       - uses: actions/cache@v4
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
-          key: ${{ runner.os }}-php8.3-composer-${{ hashFiles('**/composer.json') }}
+          key: ${{ runner.os }}-php8.4-composer-${{ hashFiles('**/composer.json') }}
           restore-keys: |
-            ${{ runner.os }}-php8.3-composer-
+            ${{ runner.os }}-php8.4-composer-
 
       - run: composer install --prefer-dist --no-progress --no-suggest
       - run: php vendor/bin/phpunit --coverage-clover build/logs/clover.xml
diff --git a/.github/workflows/coding_standards.yaml b/.github/workflows/coding_standards.yaml
index e478bfa..0104076 100644
--- a/.github/workflows/coding_standards.yaml
+++ b/.github/workflows/coding_standards.yaml
@@ -13,7 +13,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: shivammathur/setup-php@master
       with:
-        php-version: 8.3
+        php-version: 8.4
         coverage: none
     - name: Load dependencies from cache
       id: composer-cache
@@ -22,9 +22,9 @@ jobs:
     - uses: actions/cache@v4
       with:
         path: ${{ steps.composer-cache.outputs.dir }}
-        key: ${{ runner.os }}-php8.3-composer-${{ hashFiles('**/composer.json') }}
+        key: ${{ runner.os }}-php8.4-composer-${{ hashFiles('**/composer.json') }}
         restore-keys: |
-          ${{ runner.os }}-php8.3-composer-
+          ${{ runner.os }}-php8.4-composer-
 
     - run: composer validate --strict
     - run: composer install --prefer-dist --no-progress --no-suggest
diff --git a/.github/workflows/phpstan.yaml b/.github/workflows/phpstan.yaml
index b828afe..6dd5ce0 100644
--- a/.github/workflows/phpstan.yaml
+++ b/.github/workflows/phpstan.yaml
@@ -13,7 +13,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: shivammathur/setup-php@master
       with:
-        php-version: 8.3
+        php-version: 8.4
         coverage: none
     - name: Load dependencies from cache
       id: composer-cache
@@ -22,9 +22,9 @@ jobs:
     - uses: actions/cache@v4
       with:
         path: ${{ steps.composer-cache.outputs.dir }}
-        key: ${{ runner.os }}-php8.3-composer-${{ hashFiles('**/composer.json') }}
+        key: ${{ runner.os }}-php8.4-composer-${{ hashFiles('**/composer.json') }}
         restore-keys: |
-          ${{ runner.os }}-php8.3-composer-
+          ${{ runner.os }}-php8.4-composer-
 
     - run: composer install --prefer-dist --no-progress --no-suggest
     - run: composer run-script phpstan
diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 1c8ca79..43651b0 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -11,7 +11,9 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-versions: ['8.3']
+        php-versions: 
+          - 8.3
+          - 8.4
 
     name: Tests on PHP ${{ matrix.php-versions }}
     steps:
@@ -41,7 +43,7 @@ jobs:
       - uses: actions/checkout@master
       - uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.3
+          php-version: 8.4
           coverage: none
       - name: Load dependencies from cache
         id: composer-cache
@@ -50,9 +52,9 @@ jobs:
       - uses: actions/cache@v4
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
-          key: ${{ runner.os }}-php8.3-lowest-composer-${{ hashFiles('**/composer.json') }}
+          key: ${{ runner.os }}-php8.4-lowest-composer-${{ hashFiles('**/composer.json') }}
           restore-keys: |
-            ${{ runner.os }}-php8.3-lowest-composer-
+            ${{ runner.os }}-php8.4-lowest-composer-
       - run: composer update --no-progress --no-suggest --prefer-lowest
       - run: php vendor/bin/phpunit
 
diff --git a/composer.json b/composer.json
index f833fcf..dc1d69c 100644
--- a/composer.json
+++ b/composer.json
@@ -23,10 +23,10 @@
         "phpstan/phpstan": "^2.0"
     },
     "require-dev": {
-        "brainbits/phpcs-standard": "^7.0",
+        "brainbits/phpcs-standard": "^8.0",
         "php-coveralls/php-coveralls": "^2.0",
         "phpstan/phpstan-phpunit": "^2.0",
-        "phpunit/phpunit": "^11.0"
+        "phpunit/phpunit": "^12.0"
     },
     "scripts": {
         "check-all": [
diff --git a/src/CoversClassPresentRule.php b/src/CoversClassPresentRule.php
index d56c082..f7dba0a 100644
--- a/src/CoversClassPresentRule.php
+++ b/src/CoversClassPresentRule.php
@@ -24,7 +24,7 @@
 /** @implements Rule<Class_> */
 final class CoversClassPresentRule implements Rule
 {
-    private const TEST_CLASS_ENDING_STRING = 'Test';
+    private const string TEST_CLASS_ENDING_STRING = 'Test';
 
     /** @var string */
     private $unitTestNamespaceContainsString;