diff --git a/composer.json b/composer.json
index 8861178..fba73b6 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
         }
     },
     "require": {
-        "php-di/php-di": "~5.0"
+        "php-di/php-di": "~5.0 || ~6.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^3.7"