diff --git a/composer.json b/composer.json
index 00ccbdafec..24ab07c867 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
     "type": "project",
     "description": "The \"Symfony Standard Edition\" distribution",
     "autoload": {
-        "psr-0": { "": "src/", "SymfonyStandard": "app/" }
+        "psr-4": { "": "src/", "SymfonyStandard\\": "app/" }
     },
     "require": {
         "php": ">=5.3.3",