diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 10ce437..b1ad497 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
 
     strategy:
       matrix:
-        php: ['8.1', '8.2', '8.3']
+        php: ['8.1', '8.2', '8.3', '8.4']
         stability: ['prefer-lowest', 'prefer-stable']
 
     name: PHP Tests ${{ matrix.php }} - ${{ matrix.stability }}
@@ -58,7 +58,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.2'
+          php-version: '8.3'
           extensions: dom, curl, libxml, mbstring, zip, bcmath, gd
           tools: composer
           coverage: none
diff --git a/composer.json b/composer.json
index c82beb3..dce48b2 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
     "type": "library",
     "license": "MIT",
     "require": {
-        "php": "~8.1.0|~8.2.0|~8.3.0",
+        "php": "~8.1.0|~8.2.0|~8.3.0|~8.4.0",
         "ext-dom": "*",
         "ext-bcmath": "*",
         "symfony/validator": "^4.4|^5.0|^6.0|^7.0",