diff --git a/.github/workflows/extdn-phpstan-pre-install.sh b/.github/workflows/extdn-phpstan-pre-install.sh
index 3ed692c..2dafffc 100644
--- a/.github/workflows/extdn-phpstan-pre-install.sh
+++ b/.github/workflows/extdn-phpstan-pre-install.sh
@@ -4,10 +4,10 @@ composer config prefer-stable false
 
 composer require yireo/magento2-integration-test-helper --no-update
 
-#composer config --no-plugins allow-plugins true
+composer config --no-plugins allow-plugins true
 
-#composer require --dev phpstan/extension-installer --no-update
-#composer require --dev bitexpert/phpstan-magento --no-update
+composer require --dev phpstan/extension-installer --no-update
+composer require --dev bitexpert/phpstan-magento --no-update
 
 composer require yireo/magento2-replace-bundled:^4.0 --no-update
 composer require yireo/magento2-replace-inventory:^4.0 --no-update
diff --git a/composer.json b/composer.json
index 79f93b1..e6608f6 100644
--- a/composer.json
+++ b/composer.json
@@ -22,13 +22,9 @@
     "magento/module-tax": "^100.0",
     "guzzlehttp/guzzle": "~6.0|^7.0",
     "psr/log": "^1 || ^2 || ^3",
-    "php": ">=7.0.0",
+    "php": "^7.4|^8.1",
     "ext-pcre": "*"
   },
-  "require-dev": {
-    "phpunit/phpunit": "*",
-    "composer/composer": "*@dev"
-  },
   "autoload": {
     "psr-4": {
       "Yireo\\TaxRatesManager2\\": ""