diff --git a/composer.json b/composer.json
index 6ce917a..40a8e84 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
   "keywords": ["convertkit", "api", "forms"],
   "require": {
     "php": ">=5.5",
-    "guzzlehttp/guzzle": "^6.3",
+    "guzzlehttp/guzzle": "^7.0.1",
     "monolog/monolog": "^2.0"
   },
   "require-dev": {