diff --git a/lib/reline/version.rb b/lib/reline/version.rb
index 784d7c598b..fb1c73cbd9 100644
--- a/lib/reline/version.rb
+++ b/lib/reline/version.rb
@@ -1,3 +1,3 @@
 module Reline
-  VERSION = '0.3.9'
+  VERSION = '0.4.0'
 end