diff --git a/lib/dry/core/version.rb b/lib/dry/core/version.rb
index 1aca103..61e5af1 100644
--- a/lib/dry/core/version.rb
+++ b/lib/dry/core/version.rb
@@ -1,5 +1,5 @@
 module Dry
   module Core
-    VERSION = '0.3.4'.freeze
+    VERSION = '0.4.0'.freeze
   end
 end