diff --git a/src/Symfony/Component/HttpKernel/composer.json b/src/Symfony/Component/HttpKernel/composer.json
index 4791dc1c82..0015542501 100644
--- a/src/Symfony/Component/HttpKernel/composer.json
+++ b/src/Symfony/Component/HttpKernel/composer.json
@@ -26,6 +26,7 @@
         "symfony/class-loader": "~2.1",
         "symfony/config": "~2.0",
         "symfony/console": "2.2.*",
+        "symfony/debug": "~2.3",
         "symfony/dependency-injection": "~2.0",
         "symfony/finder": "~2.0",
         "symfony/process": "~2.0",