diff --git a/composer.json b/composer.json
index af886b1..b1a51d7 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
         "ext-curl": "*",
         "ext-json": "*",
         "ext-mbstring": "*",
-        "guzzlehttp/guzzle": "^6.2"
+        "guzzlehttp/guzzle": "^6.2|^7.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8",