diff --git a/composer.json b/composer.json
index 650d829..dff0784 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,8 @@
     "require-dev": {
         "matthiasnoback/symfony-config-test": "^5.0",
         "symfony/framework-bundle": "^6.3|^7.0",
-        "symfony/phpunit-bridge": "^6.3.9|^7.0"
+        "symfony/phpunit-bridge": "^6.3.9|^7.0",
+        "phpunit/phpunit": "^9.6"
     },
     "minimum-stability": "dev",
     "autoload": {
@@ -34,9 +35,6 @@
             "Symfonycasts\\SassBundle\\Tests\\": "tests/"
         }
     },
-    "conflict": {
-        "phpunit/phpunit": ">=10"
-    },
     "scripts": {
         "tools:upgrade": [
             "@tools:upgrade:php-cs-fixer",