diff --git a/composer.json b/composer.json
index 059ebe7..1024d33 100644
--- a/composer.json
+++ b/composer.json
@@ -12,6 +12,7 @@
 	"require-dev": {
 		"nikic/php-parser": "^4.13.0",
 		"php-parallel-lint/php-parallel-lint": "^1.2",
+		"phpstan/phpstan-deprecation-rules": "^1.1",
 		"phpstan/phpstan-phpunit": "^1.0",
 		"phpstan/phpstan-strict-rules": "^1.0",
 		"phpunit/phpunit": "^9.5",
diff --git a/phpstan.neon b/phpstan.neon
index 789775e..d496eda 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,6 +1,7 @@
 includes:
 	- extension.neon
 	- phpstan-baseline.neon
+	- vendor/phpstan/phpstan-deprecation-rules/rules.neon
 	- vendor/phpstan/phpstan-phpunit/extension.neon
 	- vendor/phpstan/phpstan-phpunit/rules.neon
 	- vendor/phpstan/phpstan-strict-rules/rules.neon