diff --git a/composer.json b/composer.json
index 6eecca14..6e336d3c 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     },
     "require": {
         "php": ">=5.3.0",
-        "guzzlehttp/guzzle": "~6.3",
+        "guzzlehttp/guzzle": "^7.1",
         "guzzlehttp/guzzle-services": "~1.1"
     }
 }