diff --git a/core/data/base/CbmDigiData.h b/core/data/base/CbmDigiData.h
index a6fe40612a86825f38a5ae3f1faa06b490d091a7..c2df9257c3c27f9e5e58df273348d8899281242c 100644
--- a/core/data/base/CbmDigiData.h
+++ b/core/data/base/CbmDigiData.h
@@ -25,7 +25,7 @@
  ** @brief Collection of digis from all detector systems
  ** @author Volker Friese <v.friese@gsi.de>
  ** @since 7.12.2022
- ** @version 1.0
+ ** @version 2.0
  **/
 class CbmDigiData {
 
@@ -54,7 +54,7 @@ public:
 
   // --- ROOT serializer
 #ifndef NO_ROOT
-  ClassDefNV(CbmDigiData, 1);
+  ClassDefNV(CbmDigiData, 2);
 #endif
 
   /** @brief Clear content **/
diff --git a/core/data/global/CbmDigiEvent.h b/core/data/global/CbmDigiEvent.h
index 189755391c922260772133584243f4bdecb79f25..242740e57133ed58695947df108315761048f528 100644
--- a/core/data/global/CbmDigiEvent.h
+++ b/core/data/global/CbmDigiEvent.h
@@ -14,7 +14,7 @@
  ** @brief Collection of digis from all detector systems within one event
  ** @author Volker Friese <v.friese@gsi.de>
  ** @since 7.12.2022
- ** @version 1.0
+ ** @version 2.0
  **/
 class CbmDigiEvent {
 
@@ -36,7 +36,7 @@ public:
 
   // --- ROOT serializer
 #ifndef NO_ROOT
-  ClassDefNV(CbmDigiEvent, 1);
+  ClassDefNV(CbmDigiEvent, 2);
 #endif
 
   /** @brief Clear content **/