diff --git a/MailerInterface.php b/MailerInterface.php
index 8d9540a..ebac4b5 100644
--- a/MailerInterface.php
+++ b/MailerInterface.php
@@ -15,7 +15,7 @@
 use Symfony\Component\Mime\RawMessage;
 
 /**
- * Interface for mailers able to send emails synchronous and/or asynchronous.
+ * Interface for mailers able to send emails synchronously and/or asynchronously.
  *
  * Implementations must support synchronous and asynchronous sending.
  *