diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index 3cacdf5..0303eda 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -15,6 +15,7 @@ jobs:
         php-version:
           - "8.1"
           - "8.2"
+          - "8.3"
         dependencies:
           - "highest"
           - "lowest"
diff --git a/composer.json b/composer.json
index ed24849..ec55c82 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
         }
     ],
     "require": {
-        "php": "8.1.* | 8.2.*",
+        "php": "8.1.* | 8.2.* | 8.3.*",
         "ext-json": "*",
         "guzzlehttp/guzzle": "^6.1 | ^7.0"
     },