diff --git a/composer.json b/composer.json
index 9bb8b94..20ab6d7 100644
--- a/composer.json
+++ b/composer.json
@@ -44,6 +44,7 @@
     "ext-imagick": "*",
     "phpunit/phpunit": "dev-main",
     "phpstan/phpstan": "1.10.x-dev",
+    "phpstan/extension-installer": "^1.3",
     "friendsofphp/php-cs-fixer": "^3.54",
     "smalot/pdfparser": "dev-master"
   },
@@ -54,5 +55,11 @@
     "php-cs-fixer": "vendor/bin/php-cs-fixer fix"
   },
 
-  "minimum-stability": "stable"
+  "minimum-stability": "stable",
+
+  "config": {
+    "allow-plugins": {
+      "phpstan/extension-installer": true
+    }
+  }
 }