diff --git a/composer.json b/composer.json
index 9b1cc88..6f658e4 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
         }
     ],
     "require": {
-        "php": ">=5.3.0"
+        "php": ">=7.1.0"
     },
     "autoload": {
         "files": [