diff --git a/composer.json b/composer.json
index 2ba6575..35f7a4a 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
         }
     ],
     "require": {
-        "php": ">=5.6.0"
+        "php": ">=7.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^7.1"