diff --git a/composer.json b/composer.json
index 944f67b..dda0239 100644
--- a/composer.json
+++ b/composer.json
@@ -41,7 +41,7 @@
         "pestphp/pest-plugin-parallel": "^1.2",
         "phpmd/phpmd": "^2.13",
         "squizlabs/php_codesniffer": "^3.7",
-        "vimeo/psalm": "^5.8.0"
+        "vimeo/psalm": "^5.9.0"
     },
     "autoload": {
         "files": [