diff --git a/composer.json b/composer.json
index e2a86a1..decc764 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
     "minimum-stability": "dev",
     "require": {
         "php": ">=5.3.0",
-        "symfony/yaml": ">=2.6 <2.7"
+        "symfony/yaml": "2.6.*"
     },
     "require-dev": {
         "phpunit/phpunit": "dev-master"