diff --git a/.env b/.env
index a2c6bac..fae2fba 100644
--- a/.env
+++ b/.env
@@ -28,11 +28,8 @@ WOPI_SERVER=http://collabora:9980
 # must be manually set in .env.local
 # ADMIN_PASSWORD=
 
-## Symfony/swiftmailer
-## Mailer
 ###> symfony/mailer ###
-# MAILER_DSN=smtp://localhost
-MAILER_DSN=
+# MAILER_DSN=null://null
 ###< symfony/mailer ###
 
 ## Notifications
diff --git a/symfony.lock b/symfony.lock
index 6f1bff0..be5bb6f 100644
--- a/symfony.lock
+++ b/symfony.lock
@@ -568,9 +568,9 @@
         "version": "5.4",
         "recipe": {
             "repo": "github.com/symfony/recipes",
-            "branch": "master",
+            "branch": "main",
             "version": "4.3",
-            "ref": "bbfc7e27257d3a3f12a6fb0a42540a42d9623a37"
+            "ref": "2bf89438209656b85b9a49238c4467bff1b1f939"
         },
         "files": [
             "config/packages/mailer.yaml"