diff --git a/lib/reline/version.rb b/lib/reline/version.rb
index 194d16e69a..8f21e6a9cf 100644
--- a/lib/reline/version.rb
+++ b/lib/reline/version.rb
@@ -1,3 +1,3 @@
 module Reline
-  VERSION = '0.4.1'
+  VERSION = '0.5.0.pre.1'
 end