diff --git a/composer.json b/composer.json
index e1c2308..8bcf050 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
   ],
   "require": {
     "php": ">=5.5.0",
-    "guzzlehttp/guzzle": "^6.2"
+    "guzzlehttp/guzzle": "^6.2|^7.0"
   },
   "autoload": {
     "psr-4": {