diff --git a/composer.json b/composer.json
index 1017f09..b743a66 100644
--- a/composer.json
+++ b/composer.json
@@ -39,7 +39,10 @@
     },
     "config": {
         "process-timeout": 0,
-        "sort-packages": true
+        "sort-packages": true,
+        "allow-plugins": {
+            "phpstan/extension-installer": true
+        }
     },
     "autoload": {
         "psr-4": {