diff --git a/composer.json b/composer.json
index 3805c61..4f88269 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
     "type": "library",
     "require": {
         "php": ">=7.0",
-        "guzzlehttp/guzzle": "^6.3",
+        "guzzlehttp/guzzle": "^6.3 || ^7.0",
         "ext-curl": "*",
         "ext-json": "*",
         "ext-simplexml": "*",