diff --git a/composer.json b/composer.json
index 43760144..aee46860 100644
--- a/composer.json
+++ b/composer.json
@@ -19,6 +19,11 @@
         "squizlabs/php_codesniffer": "^3.3",
         "phpunit/phpunit": "^7.5"
     },
+    "conflict": {
+        "nette/di": ">=3.0"
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true,
     "suggest": {
         "phpstan/phpstan-deprecation-rules": "For catching deprecations, especially in Drupal core."
     },
diff --git a/extension.neon b/extension.neon
index 8c976a1e..fa8fa391 100644
--- a/extension.neon
+++ b/extension.neon
@@ -24,10 +24,10 @@ rules:
 	- PHPStan\Rules\Drupal\PluginManager\PluginManagerSetsCacheBackendRule
 services:
 	drupal.serviceMapFactory:
-		class: PHPStan\Drupal\ServiceMapFactoryInterface
+		class: PHPStan\Drupal\ServiceMapFactory
 		factory: PHPStan\Drupal\ServiceMapFactory(%drupalServiceMap%)
 	-
-		class: @drupal.serviceMapFactory::create()
+		factory: @drupal.serviceMapFactory::create()
 	-
 		class: PHPStan\Type\EntityTypeManagerGetStorageDynamicReturnTypeExtension
 		arguments: