diff --git a/lib/govuk/components/version.rb b/lib/govuk/components/version.rb
index 377a184f..08a89082 100644
--- a/lib/govuk/components/version.rb
+++ b/lib/govuk/components/version.rb
@@ -1,5 +1,5 @@
 module Govuk
   module Components
-    VERSION = '4.0.0a2'.freeze
+    VERSION = '4.0.0rc1'.freeze
   end
 end