diff --git a/app/config/config_dev.yml b/app/config/config_dev.yml
index 20b7606bb0..b91b77de86 100644
--- a/app/config/config_dev.yml
+++ b/app/config/config_dev.yml
@@ -34,4 +34,4 @@ assetic:
     use_controller: true
 
 #swiftmailer:
-#    delivery_address: me@example.com
+#    delivery_addresses: ['me@example.com']
diff --git a/composer.json b/composer.json
index 01f75a5246..b35f5a5b60 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
         "doctrine/orm": "^2.4.8",
         "doctrine/doctrine-bundle": "~1.4",
         "symfony/assetic-bundle": "~2.3",
-        "symfony/swiftmailer-bundle": "~2.3",
+        "symfony/swiftmailer-bundle": "~2.3,>=2.3.10",
         "symfony/monolog-bundle": "~2.11.3",
         "sensio/distribution-bundle": "~4.0",
         "sensio/framework-extra-bundle": "^3.0.2",