diff --git a/composer.json b/composer.json
index 82fb2f764bb7..c46ad17ce94a 100644
--- a/composer.json
+++ b/composer.json
@@ -65,7 +65,7 @@
         "turbo124/beacon": "^1",
         "turbo124/laravel-gmail": "^5.0",
         "webpatser/laravel-countries": "dev-master#75992ad",
-        "wildbit/postmark-php": "^4.0"
+        "wildbit/swiftmailer-postmark": "^3.3"
     },
     "require-dev": {
         "php": "^7.4",
diff --git a/composer.lock b/composer.lock
index ef67f580749a..3415f0b38265 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "559255a3f2573bb2598a3f97f926c088",
+    "content-hash": "7b93ec16ae5791e0767c92eaf7061cc7",
     "packages": [
         {
             "name": "asgrim/ofxparser",
@@ -9737,22 +9737,22 @@
             "time": "2019-07-12T14:06:05+00:00"
         },
         {
-            "name": "wildbit/postmark-php",
-            "version": "4.0.0",
+            "name": "wildbit/swiftmailer-postmark",
+            "version": "3.3.0",
             "source": {
                 "type": "git",
-                "url": "https://github.com/wildbit/postmark-php.git",
-                "reference": "136e3d0884411ca23d0bac02470cfa1d14be676c"
+                "url": "https://github.com/wildbit/swiftmailer-postmark.git",
+                "reference": "44ccab7834de8b220d292647ecb2cb683f9962ee"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/wildbit/postmark-php/zipball/136e3d0884411ca23d0bac02470cfa1d14be676c",
-                "reference": "136e3d0884411ca23d0bac02470cfa1d14be676c",
+                "url": "https://api.github.com/repos/wildbit/swiftmailer-postmark/zipball/44ccab7834de8b220d292647ecb2cb683f9962ee",
+                "reference": "44ccab7834de8b220d292647ecb2cb683f9962ee",
                 "shasum": ""
             },
             "require": {
                 "guzzlehttp/guzzle": "^6.0|^7.0",
-                "php": ">=7.0.0"
+                "swiftmailer/swiftmailer": "^6.0.0"
             },
             "require-dev": {
                 "phpunit/phpunit": "^6.0.0"
@@ -9767,12 +9767,18 @@
             "license": [
                 "MIT"
             ],
-            "description": "The officially supported client for Postmark (http://postmarkapp.com)",
+            "authors": [
+                {
+                    "name": "Postmark",
+                    "email": "support@postmarkapp.com"
+                }
+            ],
+            "description": "A Swiftmailer Transport for Postmark.",
             "support": {
-                "issues": "https://github.com/wildbit/postmark-php/issues",
-                "source": "https://github.com/wildbit/postmark-php/tree/4.0.0"
+                "issues": "https://github.com/wildbit/swiftmailer-postmark/issues",
+                "source": "https://github.com/wildbit/swiftmailer-postmark/tree/3.3.0"
             },
-            "time": "2020-09-10T16:36:51+00:00"
+            "time": "2020-09-10T10:54:20+00:00"
         }
     ],
     "packages-dev": [