diff --git a/composer.json b/composer.json
index 582b0317..1e1869f4 100644
--- a/composer.json
+++ b/composer.json
@@ -46,7 +46,7 @@
     "require-dev": {
         "php-parallel-lint/php-parallel-lint": "1.4.0",
         "phpstan/extension-installer": "1.4.3",
-        "phpstan/phpstan": "1.12.8",
+        "phpstan/phpstan": "1.12.9",
         "phpstan/phpstan-phpunit": "1.4.0",
         "phpstan/phpstan-strict-rules": "1.6.1",
         "phpunit/phpunit": "9.6.21",