diff --git a/composer.json b/composer.json
index 90afe72..2493d8b 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
         }
     ],
     "require": {
-        "php": ">=7.1"
+        "php": "^7.2 || ^8.0"
     },
     "autoload" : {
       "psr-4" : {