diff --git a/composer.json b/composer.json
index 6775b17..3e3fd5a 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
   ],
   "require": {
     "illuminate/container": ">=5.0",
-    "swiftmailer/swiftmailer": "~5.1"
+    "swiftmailer/swiftmailer": "~5.1||~6.0"
   },
   "autoload": {
     "psr-4": {