diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 946f26e..76caade 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-versions: ['7.4.*', '8.0.*', '8.1.*', '8.2.*', '8.3.*']
+        php-versions: ['7.4.*', '8.0.*', '8.1.*', '8.2.*', '8.3.*', '8.4.*']
     steps:
       - uses: actions/checkout@v2
       - name: Setup PHP
diff --git a/composer.json b/composer.json
index 9455f43..10a40c4 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
     "squizlabs/php_codesniffer": "3.*"
   },
   "require": {
-    "php": "7.4.* || 8.0.* || 8.1.* || 8.2.* || 8.3.*",
+    "php": "7.4.* || 8.0.* || 8.1.* || 8.2.* || 8.3.* || 8.4.*",
     "ext-xmlreader": "*",
     "ext-simplexml": "*",
     "ext-xmlwriter": "*",