diff --git a/composer.json b/composer.json
index 32fa361..9bbdea0 100644
--- a/composer.json
+++ b/composer.json
@@ -35,7 +35,7 @@
     "phpstan/extension-installer": "^1.2.0",
     "phpstan/phpstan": "^1.10.3",
     "phpstan/phpstan-deprecation-rules": "^1.1.2",
-    "phpstan/phpstan-phpunit": "^1.3.8",
+    "phpstan/phpstan-phpunit": "^1.3.9",
     "phpunit/phpunit": "^10.0.13"
   },
   "suggest": {