diff --git a/Project.toml b/Project.toml
index 062dc1c..1d931de 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "EDM4hep"
 uuid = "eb32b910-dde9-4347-8fce-cd6be3498f0c"
 authors = ["Pere Mato <pere.mato@cern.ch>"]
-version = "0.3.1"
+version = "0.4.0"
 
 [deps]
 Accessors = "7d9f7c33-5ae7-4f3b-8dc6-eff91059b697"