diff --git a/composer.json b/composer.json
index 116144f..bc421d8 100644
--- a/composer.json
+++ b/composer.json
@@ -42,7 +42,7 @@
 		"php-coveralls/php-coveralls": "^2.5.3",
 		"phpspec/prophecy": "^1.15.0",
 		"phpstan/extension-installer": "^1.1.0",
-		"phpstan/phpstan": "^1.8.7",
+		"phpstan/phpstan": "^1.8.8",
 		"phpstan/phpstan-phpunit": "^1.1.1",
 		"phpstan/phpstan-strict-rules": "^1.4.4",
 		"phpunit/phpunit": "^8.5.30",