diff --git a/composer.json b/composer.json
index af1136b..d0eb233 100644
--- a/composer.json
+++ b/composer.json
@@ -14,6 +14,7 @@
     }],
     "minimum-stability": "dev",
     "require": {
+		"php": "^7.2.5",
         "guzzlehttp/guzzle": "^7.1@dev"
 	},
 	"autoload": {