diff --git a/composer.json b/composer.json
index a265b6e..0856ae4 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
   ],
   "require": {
     "php": ">=5.5.9",
-    "guzzlehttp/guzzle": "~6.1"
+    "guzzlehttp/guzzle": "~6.1|^7.0"
   },
   "require-dev": {
     "drupal/coder": "8.2.*",