diff --git a/lib/celluloid/version.rb b/lib/celluloid/version.rb
index <HASH>..<HASH> 100644
--- a/lib/celluloid/version.rb
+++ b/lib/celluloid/version.rb
@@ -1,3 +1,3 @@
 module Celluloid
-  VERSION = '0.17.0.pre3'
+  VERSION = '0.17.0.pre4'
 end
cutting pre4 after major refactor in celluloid-supervision