diff --git a/composer.json b/composer.json
index 2ffc646..fc7181d 100644
--- a/composer.json
+++ b/composer.json
@@ -36,8 +36,8 @@
     "license": "Apache-2.0",
     "type": "library",
     "require": {
-        "php": ">=5.5.9",
-        "guzzlehttp/guzzle": "~6"
+        "php": ">=7.2.5",
+        "guzzlehttp/guzzle": "~7"
     },
     "require-dev": {
         "phpunit/phpunit": "5.7"