diff --git a/composer.json b/composer.json
index 3c5986e..a81921f 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
         "php": "~8.1.0||~8.2.0||~8.3.0",
         "mustache/mustache": "^2.12",
         "xantios/mimey": "^2.2",
-        "symfony/yaml": "^2.3 || ^3.3 || ^4.0 || ^5.0",
+        "symfony/yaml": "^2.3 || ^3.3 || ^4.0 || ^5.0 || ^6.0",
         "laminas/laminas-http": "^2.6.0",
         "laminas/laminas-stdlib": "^3.2.1"
     },