diff --git a/composer.json b/composer.json
index 518000e..42a6fa9 100644
--- a/composer.json
+++ b/composer.json
@@ -33,7 +33,7 @@
         "ergebnis/composer-normalize": "^2.41.1",
         "laminas/laminas-diactoros": "^3.3.0",
         "php-http/curl-client": "^2.3.1",
-        "phpunit/phpunit": "^10.5.5",
+        "phpunit/phpunit": "^12.0.0",
         "psalm/plugin-phpunit": "^0.19.0",
         "react/child-process": "^0.6.5",
         "react/http": "^1.9",