diff --git a/main.go b/main.go
index b2c1fe7..bfa11f6 100644
--- a/main.go
+++ b/main.go
@@ -16,7 +16,7 @@ import (
 )
 
 var (
-	version    = "0.3.2"
+	version    = "0.4.0"
 	user_agent = fmt.Sprint("github-markdown-toc.go v", version)
 )