diff --git a/composer.lock b/composer.lock
index 0ac4f53c..114e2943 100644
--- a/composer.lock
+++ b/composer.lock
@@ -231,16 +231,16 @@
         },
         {
             "name": "phpmailer/phpmailer",
-            "version": "v6.5.0",
+            "version": "v6.6.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/PHPMailer/PHPMailer.git",
-                "reference": "a5b5c43e50b7fba655f793ad27303cd74c57363c"
+                "reference": "9400f305a898f194caff5521f64e5dfa926626f3"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/PHPMailer/PHPMailer/zipball/a5b5c43e50b7fba655f793ad27303cd74c57363c",
-                "reference": "a5b5c43e50b7fba655f793ad27303cd74c57363c",
+                "url": "https://api.github.com/repos/PHPMailer/PHPMailer/zipball/9400f305a898f194caff5521f64e5dfa926626f3",
+                "reference": "9400f305a898f194caff5521f64e5dfa926626f3",
                 "shasum": ""
             },
             "require": {
@@ -252,10 +252,12 @@
             "require-dev": {
                 "dealerdirect/phpcodesniffer-composer-installer": "^0.7.0",
                 "doctrine/annotations": "^1.2",
+                "php-parallel-lint/php-console-highlighter": "^1.0.0",
+                "php-parallel-lint/php-parallel-lint": "^1.3.2",
                 "phpcompatibility/php-compatibility": "^9.3.5",
                 "roave/security-advisories": "dev-latest",
-                "squizlabs/php_codesniffer": "^3.5.6",
-                "yoast/phpunit-polyfills": "^0.2.0"
+                "squizlabs/php_codesniffer": "^3.6.2",
+                "yoast/phpunit-polyfills": "^1.0.0"
             },
             "suggest": {
                 "ext-mbstring": "Needed to send email in multibyte encoding charset or decode encoded addresses",
@@ -295,7 +297,7 @@
             "description": "PHPMailer is a full-featured email creation and transfer class for PHP",
             "support": {
                 "issues": "https://github.com/PHPMailer/PHPMailer/issues",
-                "source": "https://github.com/PHPMailer/PHPMailer/tree/v6.5.0"
+                "source": "https://github.com/PHPMailer/PHPMailer/tree/v6.6.3"
             },
             "funding": [
                 {
@@ -303,7 +305,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2021-06-16T14:33:43+00:00"
+            "time": "2022-06-20T09:21:02+00:00"
         },
         {
             "name": "psr/container",
@@ -1232,5 +1234,5 @@
         "ext-xml": "*"
     },
     "platform-dev": [],
-    "plugin-api-version": "2.2.0"
+    "plugin-api-version": "2.3.0"
 }