diff --git a/.github/workflows/full-checks.yml b/.github/workflows/full-checks.yml
index be5e26a..ee0552c 100644
--- a/.github/workflows/full-checks.yml
+++ b/.github/workflows/full-checks.yml
@@ -25,6 +25,7 @@ jobs:
           - "8.1"
           - "8.2"
           - "8.3"
+          - "8.4"
         operating-system:
           - "ubuntu-22.04"
 
diff --git a/composer.json b/composer.json
index 2b376be..9705cda 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
   "description": "Library to help make testing of PHPStan rules easier",
   "type": "library",
   "require": {
-    "php": "~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0",
+    "php": "~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0",
     "phpstan/phpstan": "^1.6"
   },
   "require-dev": {