diff --git a/composer.json b/composer.json
index 1ab6ccf..410e2ce 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         }
     ],
     "require": {
-        "php": "^7.1",
+        "php": "^7.0",
         "symfony/framework-bundle": "^3.4|^4.0|^5.0",
         "symfony/options-resolver": "^3.4.4|^4.0|^5.0",
         "symfony/property-info": "^3.4|^4.0|^5.0",