diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 2db0a46..7596322 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [8.2, 8.1, 8.0]
+        php: [8.3, 8.2, 8.1, 8.0]
         dependency-version: [prefer-lowest, prefer-stable]
         os: [ubuntu-latest, windows-latest]
 
diff --git a/composer.json b/composer.json
index 745e3d5..6edd148 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
 
   },
   "require": {
-    "php": ">=8.0 <8.3"
+    "php": ">=8.0 <8.4"
   },
   "require-dev": {
     "phpunit/phpunit": ">=9.0",