diff --git a/composer.json b/composer.json
index 9407819..d879276 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
         }
     ],
     "require": {
-        "php": "^5.6"
+        "php": "^7.0"
     },
     "autoload": {
         "psr-4": {