diff --git a/composer.json b/composer.json
index 392fa1a..6468750 100644
--- a/composer.json
+++ b/composer.json
@@ -17,13 +17,13 @@
         "github-domains": ["github.com"]
     },
     "require": {
-        "php": "^7.0",
-        "symfony/symfony": "^3.0|^4.0",
+        "php": ">=5.6.0",
+        "symfony/symfony": "~2.7|^3.0|^4.0",
         "friendsofsymfony/user-bundle": "~2.0",
         "monolog/monolog": "~1.6,>=1.6.0"
     },
     "require-dev": {
-        "phpunit/phpunit":  "~7.0",
+        "phpunit/phpunit":  "~5.0",
         "friendsofphp/php-cs-fixer": "^2.2"
     },
     "autoload": {