diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index 2c8cc64..b5ad2da 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -2,25 +2,30 @@ name: 'Unit Tests'
 
 on:
   push:
-    branches: [ main ]
+    branches: [ release-1.x ]
   pull_request:
-    branches: [ main ]
+    branches: [ release-1.x ]
 
 jobs:
   build-test:
-
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        composer: [lowest, highest]
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Setup PHP 8
         uses: shivammathur/setup-php@v2
         with:
           php-version: 8.1
-          tools: composer:v2
+          tools: none
           coverage: none
       - name: Composer Install
-        run: composer update --no-interaction --no-progress --ansi
+        uses: ramsey/composer-install@v2
+        with:
+          dependency-versions: ${{ matrix.composer }}
       - name: Unit Tests
         run: ./vendor/bin/pest --colors=always
\ No newline at end of file
diff --git a/composer.json b/composer.json
index aa70f39..a4a07d6 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
   ],
   "require": {
     "php": "^8.1",
-    "nikic/php-parser": "^v4.14",
+    "nikic/php-parser": "^v4.18 || ^5.0",
     "cspray/typiphy": "^0.3"
   },
   "require-dev": {
diff --git a/src/PhpParserAnnotatedTargetParser.php b/src/PhpParserAnnotatedTargetParser.php
index b3cc425..766b191 100644
--- a/src/PhpParserAnnotatedTargetParser.php
+++ b/src/PhpParserAnnotatedTargetParser.php
@@ -29,7 +29,7 @@ final class PhpParserAnnotatedTargetParser implements AnnotatedTargetParser {
     private readonly Parser $parser;
 
     public function __construct() {
-        $this->parser = (new ParserFactory())->create(ParserFactory::ONLY_PHP7);
+        $this->parser = (new ParserFactory())->createForNewestSupportedVersion();
     }
 
     public function parse(AnnotatedTargetParserOptions $options) : Generator {