diff --git a/composer.json b/composer.json
index 47ec0b51c..728f40279 100644
--- a/composer.json
+++ b/composer.json
@@ -94,7 +94,6 @@
     "flow/jsonpath": "^0.5",
     "kint-php/kint": "^3.3",
     "mockery/mockery": "^1.0",
-    "phpstan/extension-installer": "^1.0",
     "phpstan/phpstan": "^0.12",
     "phpstan/phpstan-doctrine": "^0.12",
     "phpunit/php-timer": "^5.0",
diff --git a/composer.lock b/composer.lock
index 8b66f2071..40f4aaeba 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "cfd725641e673f349f383d4455803f72",
+    "content-hash": "340ce72e10ffba438017513fbda1a484",
     "packages": [
         {
             "name": "aws/aws-sdk-php",
@@ -9542,51 +9542,6 @@
             ],
             "time": "2020-07-08T12:44:21+00:00"
         },
-        {
-            "name": "phpstan/extension-installer",
-            "version": "1.0.5",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/phpstan/extension-installer.git",
-                "reference": "5c2da3846819f951385cb6a25d3277051481c48a"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/extension-installer/zipball/5c2da3846819f951385cb6a25d3277051481c48a",
-                "reference": "5c2da3846819f951385cb6a25d3277051481c48a",
-                "shasum": ""
-            },
-            "require": {
-                "composer-plugin-api": "^1.1 || ^2.0",
-                "php": "^7.1 || ^8.0",
-                "phpstan/phpstan": ">=0.11.6"
-            },
-            "require-dev": {
-                "composer/composer": "^1.8",
-                "consistence/coding-standard": "^3.8",
-                "dealerdirect/phpcodesniffer-composer-installer": "^0.7.0",
-                "ergebnis/composer-normalize": "^2.0.2",
-                "phing/phing": "^2.16",
-                "php-parallel-lint/php-parallel-lint": "^1.2.0",
-                "phpstan/phpstan-strict-rules": "^0.11",
-                "slevomat/coding-standard": "^5.0.4"
-            },
-            "type": "composer-plugin",
-            "extra": {
-                "class": "PHPStan\\ExtensionInstaller\\Plugin"
-            },
-            "autoload": {
-                "psr-4": {
-                    "PHPStan\\ExtensionInstaller\\": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "description": "Composer plugin for automatic installation of PHPStan extensions",
-            "time": "2020-08-30T12:06:42+00:00"
-        },
         {
             "name": "phpstan/phpstan",
             "version": "0.12.40",
diff --git a/phpstan.neon b/phpstan.neon
index aff0cc440..0b3fc9e44 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -13,4 +13,7 @@ parameters:
 
     ignoreErrors:
         # Caused by Symfony Validator (perhaps wrongly) returning the interface.
-        - '#Cannot cast Symfony\\Component\\Validator\\ConstraintViolationListInterface to string.#'
\ No newline at end of file
+        - '#Cannot cast Symfony\\Component\\Validator\\ConstraintViolationListInterface to string.#'
+
+includes:
+    - vendor/phpstan/phpstan-doctrine/extension.neon
\ No newline at end of file