diff --git a/main.go b/main.go
index 5b95236..f329726 100644
--- a/main.go
+++ b/main.go
@@ -13,7 +13,7 @@ import (
 )
 
 // Version is a version number.
-var version = "0.3.25"
+var version = "0.4.0-beta1"
 
 func main() {
 	log.SetOutput(logOutput())