diff --git a/composer.json b/composer.json
index 4f548dc..82d992d 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
     }
   },
   "require": {
-    "guzzlehttp/guzzle": "^6.3",
+    "guzzlehttp/guzzle": "^6.3|^7.0",
     "league/flysystem": "^1.0",
     "ext-openssl": "*",
     "ext-json": "*"