diff --git a/doc.go b/doc.go
index 88a12ee..6878d86 100644
--- a/doc.go
+++ b/doc.go
@@ -11,4 +11,4 @@ package mail
 
 // VERSION indicates the current version of the package. It is also attached to the default user
 // agent string.
-const VERSION = "0.5.1"
+const VERSION = "0.5.2"