diff --git a/composer.json b/composer.json
index 8c11b515..befd66e2 100644
--- a/composer.json
+++ b/composer.json
@@ -50,9 +50,10 @@
         "cache/array-adapter": "^1.2"
     },
     "require-dev": {
+        "php": "^8.3",
         "ext-intl": "*",
         "behat/behat": "^3.4.3",
-        "phpunit/phpunit": "^10.0.0",
+        "phpunit/phpunit": "^12.0",
         "league/event": "^2.1",
         "hoa/ruler": "^2.17",
         "hiqdev/hidev": "dev-master",
@@ -60,7 +61,7 @@
         "hiqdev/hidev-behat": "dev-master",
         "hiqdev/hidev-hiqdev": "dev-master",
         "hiqdev/php-data-mapper": "dev-master",
-        "vimeo/psalm": "^5.0",
+        "vimeo/psalm": "^6.13.1",
         "opis/closure": "3.x-dev as 3.6.x-dev",
         "cache/array-adapter": "*",
         "matthiasnoback/behat-expect-exception": "^v0.3.0",