diff --git a/composer.json b/composer.json
index 3a61c51..b3c60cc 100644
--- a/composer.json
+++ b/composer.json
@@ -15,6 +15,7 @@
         "psr-4": { "App\\": "src/" }
     },
     "require": {
+        "php": "^7.2.0",
         "symfony/http-foundation": "^4.1",
         "slim/php-view": "^2.2"
     }