fix

composer.json

@@ -29,7 +29,7 @@
   "require": {
     "php": ">=5.4.0",
     "ext-json": "*",
-    "symfony/http-foundation": "~2.6|~2.7|~2.8|~3.0|~4.0",
+    "symfony/http-foundation": ">=2.6",
     "doctrine/annotations": "^1.2.7"
   },
   "minimum-stability": "stable"