diff --git a/composer.json b/composer.json
index 7025976..8cccbc5 100644
--- a/composer.json
+++ b/composer.json
@@ -10,9 +10,9 @@
     "prefer-stable": true,
     "require": {
         "php": "^7.4 || ^8.0",
-        "ext-json": "*",
         "ext-dom": "*",
-        "ibexa/test-core": "~5.0.x-dev",
+        "ext-json": "*",
+        "ibexa/test-core": "dev-ibx-8470-symfony-6 as 5.0.x-dev",
         "justinrainbow/json-schema": "^5.2",
         "symfony/browser-kit": "^5.4",
         "symfony/mime": "^5.4",
@@ -22,8 +22,8 @@
     },
     "require-dev": {
         "ibexa/code-style": "^1.1",
-        "ibexa/core": "~5.0.x-dev",
-        "ibexa/doctrine-schema": "~5.0.x-dev",
+        "ibexa/core": "dev-ibx-8470-symfony-6 as 5.0.x-dev",
+        "ibexa/doctrine-schema": "dev-ibx-8470-symfony-6 as 5.0.x-dev",
         "phpstan/phpstan": "^1.2",
         "phpstan/phpstan-phpunit": "^1.0",
         "phpunit/phpunit": "^9"