diff --git a/composer.json b/composer.json
index bc37f97..ec5a858 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
   "require-dev": {
     "mimmi20/coding-standard": "^3.0.10",
     "phpstan/extension-installer": "^1.1.0",
-    "phpstan/phpstan": "^1.8.3",
+    "phpstan/phpstan": "^1.8.4",
     "phpstan/phpstan-deprecation-rules": "^1.0.0",
     "phpstan/phpstan-phpunit": "^1.1.1",
     "phpunit/phpunit": "^9.5.24"