diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 16bc1d5..80d60af 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,6 +45,7 @@ jobs:
         php-version:
           - "8.2"
           - "8.3"
+          - "8.4"
         dependencies:
           - "highest"
 
diff --git a/composer.json b/composer.json
index 94e8247..4dfc713 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
         }
     ],
     "require": {
-        "php": "~8.2.0 || ~8.3.0",
+        "php": "~8.2.0 || ~8.3.0 || ~8.4.0",
         "phpstan/phpstan": "^2.0.1"
     },
     "require-dev": {