diff --git a/composer.json b/composer.json
index 4ac1f0a7..287bf1a3 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
         "ext-simplexml": "*",
         "ext-xml": "*",
         "ext-openssl": "*",
-        "guzzlehttp/guzzle": "~6.0"
+        "guzzlehttp/guzzle": "^6.* || ^7.*"
     },
     "require-dev": {
         "codeception/codeception": "*"