diff --git a/composer.json b/composer.json
index 607a5bb..60d9241 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
     "type": "project",
     "require": {
         "sendgrid/sendgrid": "^7.5",
-        "phpmailer/phpmailer": "^5.5",
+        "phpmailer/phpmailer": "^6.5",
         "ifsnop/mysqldump-php": "^2.9"
     },
     "license": "MIT",