diff --git a/composer.json b/composer.json
index b36e743..66b7772 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
     }
   ],
   "require": {
-    "php": ">=7.0"
+    "php": ">=7.1"
   },
   "require-dev": {
     "phpunit/phpunit": "^6.0",