diff --git a/composer.json b/composer.json
index d6503fa..e32c446 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,8 @@
     ],
     "require": {
         "php": ">=5.3.2",
-        "tracy/tracy": "2.3.*"
+        "tracy/tracy": "2.3.*",
+        "symfony/security": "<3.0"
     },
     "autoload": {
         "psr-0": {