diff --git a/composer.json b/composer.json
index cb26e3c..43f72b9 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
     }
   ],
   "require": {
-    "guzzlehttp/guzzle": "^6.3",
+    "guzzlehttp/guzzle": "^6.3|^7.0.0",
     "monolog/monolog": "^1.24|^2.0",
     "ext-json": "*"
   },