diff --git a/composer.json b/composer.json
index d3733d0..3707b4f 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
     "require"           : {
         "php"          : ">=5.3",
         "jbzoo/utils"  : "^1.4.2",
-        "symfony/yaml" : "^2.7"
+        "symfony/yaml" : "^2.8|^3.0"
     },
     "require-dev"       : {
         "jbzoo/phpunit" : "^1.2"