diff --git a/composer.json b/composer.json
index e4f9ff0..1912c91 100644
--- a/composer.json
+++ b/composer.json
@@ -36,7 +36,7 @@
     "require-dev": {
         "ext-gd": "*",
         "laminas/laminas-coding-standard": "~2.5.0",
-        "phpunit/phpunit": "^9.5.26",
+        "phpunit/phpunit": "^10.0.0",
         "psalm/plugin-phpunit": "^0.18.4",
         "vimeo/psalm": "^5.1"
     },