diff --git a/.github/workflows/test_extension.yml b/.github/workflows/test_extension.yml
index a5aa364..1edb9ca 100644
--- a/.github/workflows/test_extension.yml
+++ b/.github/workflows/test_extension.yml
@@ -54,6 +54,9 @@ jobs:
       - name: PHP 8.2 compatibility
         run: composer sniffer:php8.2
 
+      - name: PHP 8.3 compatibility
+        run: composer sniffer:php8.3
+
   Static-tests:
     runs-on: ubuntu-latest
 
diff --git a/README.md b/README.md
index 9f1c3d7..9c6fe78 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,7 @@
 ![PHP](https://img.shields.io/badge/php-8.0-blue)
 ![PHP](https://img.shields.io/badge/php-8.1-blue)
 ![PHP](https://img.shields.io/badge/php-8.2-blue)
+![PHP](https://img.shields.io/badge/php-8.3-blue)
 ![composer](https://shields.io/badge/composer-v2-darkgreen)
 ![packagist](https://img.shields.io/badge/packagist-f28d1a)
 ![build](https://github.com/run-as-root/magento-cli-auto-proxy/actions/workflows/test_extension.yml/badge.svg)
diff --git a/composer.json b/composer.json
index 5bbdfaf..7e529e9 100644
--- a/composer.json
+++ b/composer.json
@@ -46,6 +46,7 @@
     "sniffer:php8.0": "phpcs -p ./lib --standard=vendor/phpcompatibility/php-compatibility/PHPCompatibility --runtime-set testVersion 8.0",
     "sniffer:php8.1": "phpcs -p ./lib --standard=vendor/phpcompatibility/php-compatibility/PHPCompatibility --runtime-set testVersion 8.1",
     "sniffer:php8.2": "phpcs -p ./lib --standard=vendor/phpcompatibility/php-compatibility/PHPCompatibility --runtime-set testVersion 8.2",
+    "sniffer:php8.3": "phpcs -p ./lib --standard=vendor/phpcompatibility/php-compatibility/PHPCompatibility --runtime-set testVersion 8.3",
     "phpstan": "phpstan",
     "phpunit": "vendor/bin/phpunit -c phpunit.xml"
   }