diff --git a/composer.json b/composer.json
index 627faf6..a583de2 100755
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
         "phpunit/phpunit": "^7"
     },
     "require": {
-        "php": "^7.1",
+        "php": ">=7.1",
         "ext-simplexml": "*"
     }
 }