diff --git a/composer.json b/composer.json
index c6941d7..4b338a9 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
     "type": "library",
     "require": {
         "php": "~8.1.0 || ~8.2.0 || ~8.3.0",
-        "phpunit/phpunit": "^9.0 || ^10.0 || ^11.0",
+        "phpunit/phpunit": "^9.0",
         "psr/container": "^1.0 || ^2.0",
         "zalas/injector": "^2.0"
     },
diff --git a/tests/phar/phpunit.xml b/tests/phar/phpunit.xml
index dab383e..169a007 100644
--- a/tests/phar/phpunit.xml
+++ b/tests/phar/phpunit.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/8.0/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="../../vendor/phpunit/phpunit/phpunit.xsd"
          beStrictAboutOutputDuringTests="true"
          beStrictAboutTodoAnnotatedTests="true"
          verbose="true"