diff --git a/composer.json b/composer.json
index 0baefc3528d090bbed41589085d5a404cc8bd32e..d446d53d0e1f82c9ec35f02286cd5f1c5ee459c3 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
         }
     ],
     "require": {
-        "php": ">=5.5"
+        "php": ">=7.0"
     },
     "require-dev": {
         "phpunit/phpunit": "<7",