diff --git a/composer.json b/composer.json
index 5882934..6d27661 100644
--- a/composer.json
+++ b/composer.json
@@ -44,6 +44,7 @@
         }
     ],
     "require": {
+        "php": ">=7.0.0",
         "composer-plugin-api": "^1.0"
     },
     "require-dev": {