diff --git a/lib/cocaine/version.rb b/lib/cocaine/version.rb
index 6e06077..780fd7c 100644
--- a/lib/cocaine/version.rb
+++ b/lib/cocaine/version.rb
@@ -1,3 +1,3 @@
 module Cocaine
-  VERSION = "0.3.1".freeze
+  VERSION = "0.4.0".freeze
 end