diff --git a/composer.json b/composer.json
index e438d0a..3c61d4d 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
     }
   ],
   "require": {
-    "php": ">=5.4"
+    "php": ">=7.0"
   },
   "require-dev": {
     "phpunit/phpunit": "~4.0"