diff --git a/php/composer.json b/php/composer.json
index b051c632..27a0973b 100644
--- a/php/composer.json
+++ b/php/composer.json
@@ -9,7 +9,7 @@
         "ext-json": "*"
     },
     "require-dev": {
-        "vimeo/psalm": "^5.5",
+        "vimeo/psalm": "^6.0",
         "phpunit/phpunit": "^10.3||^11.0",
         "psalm/plugin-phpunit": "^0.19.0",
         "friendsofphp/php-cs-fixer": "^3.5",