diff --git a/CMakeLists.txt b/CMakeLists.txt
index b5f9636..4e29946 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@ project(EDM4EIC
   LANGUAGES CXX)
 
 SET( ${PROJECT_NAME}_VERSION_MAJOR 8 )
-SET( ${PROJECT_NAME}_VERSION_MINOR 3 )
+SET( ${PROJECT_NAME}_VERSION_MINOR 4 )
 SET( ${PROJECT_NAME}_VERSION_PATCH 0 )
 SET( ${PROJECT_NAME}_VERSION  "${${PROJECT_NAME}_VERSION_MAJOR}.${${PROJECT_NAME}_VERSION_MINOR}.${${PROJECT_NAME}_VERSION_PATCH}" )
 
diff --git a/edm4eic.yaml b/edm4eic.yaml
index a0ccbef..dfaa144 100644
--- a/edm4eic.yaml
+++ b/edm4eic.yaml
@@ -9,7 +9,7 @@
 ## If there are schema version changes that can be evolved, see the podio documentation
 ## for an example: https://github.com/AIDASoft/podio/tree/master/tests/schema_evolution
 ##
-schema_version: 830
+schema_version: 840
 
 options :
   # should getters / setters be prefixed with get / set?
@@ -614,6 +614,15 @@ datatypes:
       - edm4eic::Cluster  cluster           // reference to the cluster
       - edm4eic::Track track                // reference to the track
 
+  edm4eic::TrackProtoClusterMatch:
+    Description: "Match between a ProtoCluster and a Track"
+    Author: "D. Anderson, D. Kalinkin"
+    Members:
+      - float                 weight // weight of this association
+    OneToOneRelations:
+      - edm4eic::Track        from   // reference to the track
+      - edm4eic::ProtoCluster to     // reference to the protocluster
+
 links:
   edm4eic::TrackProtoClusterLink:
     Description: "Link between a ProtoCluster and a Track"