diff --git a/src/Symfony/Bundle/FrameworkBundle/composer.json b/src/Symfony/Bundle/FrameworkBundle/composer.json
index 2a06127e379db..e719a56be7516 100644
--- a/src/Symfony/Bundle/FrameworkBundle/composer.json
+++ b/src/Symfony/Bundle/FrameworkBundle/composer.json
@@ -20,6 +20,7 @@
         "ext-xml": "*",
         "symfony/cache": "^4.3|^5.0",
         "symfony/config": "^4.2|^5.0",
+        "symfony/debug": "^4.4|^5.0",
         "symfony/dependency-injection": "^4.4|^5.0",
         "symfony/error-catcher": "^4.4|^5.0",
         "symfony/http-foundation": "^4.3|^5.0",