diff --git a/composer.json b/composer.json
index 1bb9810..709e463 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
   },
   "require": {
     "php": ">=5.4.0",
-    "guzzlehttp/guzzle": "~5.0|~6.0",
+    "guzzlehttp/guzzle": "~5.0|~6.0|~7.0",
     "psr/http-message": "^1.0"
   },
   "require-dev": {