diff --git a/composer.json b/composer.json
index 3dde76f4..055c7b20 100644
--- a/composer.json
+++ b/composer.json
@@ -24,6 +24,7 @@
   },
   "type": "library",
   "require": {
+    "symfony/yaml": "^2.3 | ^3.0 | ^4.0 | ^5.0 | ^6.0 || ^7.0",
     "psr/http-message": "1.1",
     "arcanedev/log-viewer": "8.1.0",
     "larapack/doctrine-support": "0.1.9",