diff --git a/composer.json b/composer.json
index ce28f09..a302882 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.1.3",
         "mews/pos": "^0.3",
         "symfony/framework-bundle": "^4.0",
         "symfony/yaml": "^4.0"