diff --git a/composer.json b/composer.json
index a8ea8cb2..b532b07d 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         "php": ">=5.6",
         "ext-bcmath": "*",
         "ext-mbstring": "*",
-        "guzzlehttp/guzzle": "~6.0"
+        "guzzlehttp/guzzle": "~6.0 | ^7.0"
     },
     "require-dev": {
         "endroid/qrcode": "~1.9",