diff --git a/km3io/definitions/fitparameters.py b/km3io/definitions/fitparameters.py
index f7acfda708b5a9005bcb6d987f942f88c9940fd4..a92ba8f36220816978d62b18313b297f67b68d1b 100644
--- a/km3io/definitions/fitparameters.py
+++ b/km3io/definitions/fitparameters.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 """
-KM3NeT Data Definitions v1.2.2
+KM3NeT Data Definitions v1.2.3
 https://git.km3net.de/common/km3net-dataformat
 """
 
diff --git a/km3io/definitions/reconstruction.py b/km3io/definitions/reconstruction.py
index 0f05eb0a919143a87a170fbf203d9887da1fa8df..42c1c99a833f2af661e706c8966caf004e1a6dbc 100644
--- a/km3io/definitions/reconstruction.py
+++ b/km3io/definitions/reconstruction.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 """
-KM3NeT Data Definitions v1.2.2
+KM3NeT Data Definitions v1.2.3
 https://git.km3net.de/common/km3net-dataformat
 """
 
diff --git a/km3io/definitions/trigger.py b/km3io/definitions/trigger.py
index 1a460afc0f96f2081ae7118af31781564d359118..9dd75921e8aeccd7420a15ff901beddd7a1a6455 100644
--- a/km3io/definitions/trigger.py
+++ b/km3io/definitions/trigger.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 """
-KM3NeT Data Definitions v1.2.2
+KM3NeT Data Definitions v1.2.3
 https://git.km3net.de/common/km3net-dataformat
 """
 
diff --git a/km3io/definitions/w2list_genhen.py b/km3io/definitions/w2list_genhen.py
index e30d37cef4f785ca36a3ea0cdc1a757549285a69..8ff43a691ab3af6b1a2992bf4603c3a02397bec5 100644
--- a/km3io/definitions/w2list_genhen.py
+++ b/km3io/definitions/w2list_genhen.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 """
-KM3NeT Data Definitions v1.2.2
+KM3NeT Data Definitions v1.2.3
 https://git.km3net.de/common/km3net-dataformat
 """
 
diff --git a/km3io/definitions/w2list_gseagen.py b/km3io/definitions/w2list_gseagen.py
index 6e815591b243de6d2ba1a1f88e5a2a86f0f9a992..fe60876c0208653f08e3e694e1c60669da0dad54 100644
--- a/km3io/definitions/w2list_gseagen.py
+++ b/km3io/definitions/w2list_gseagen.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 """
-KM3NeT Data Definitions v1.2.2
+KM3NeT Data Definitions v1.2.3
 https://git.km3net.de/common/km3net-dataformat
 """