diff --git a/composer.json b/composer.json
index 4c2b30f..8c821fb 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^9.4",
-        "vimeo/psalm": "^4.1"
+        "vimeo/psalm": "^6.0"
     },
     "autoload": {
         "psr-4": {