diff --git a/doc.go b/doc.go
index a9b96de..f2bef6c 100644
--- a/doc.go
+++ b/doc.go
@@ -6,4 +6,4 @@
 package mail
 
 // VERSION is used in the default user agent string
-const VERSION = "0.3.6"
+const VERSION = "0.3.7"