diff --git a/composer.json b/composer.json
index 3146dfb..44c186f 100644
--- a/composer.json
+++ b/composer.json
@@ -40,7 +40,7 @@
         "phpstan/phpstan": "^1.12",
         "phpunit/phpunit": "^9.6",
         "sunrise/coding-standard": "^1.0",
-        "vimeo/psalm": "^5.26"
+        "vimeo/psalm": "^6.0"
     },
     "autoload": {
         "files": [