diff --git a/README.md b/README.md
index 62a3ca1..7885d53 100644
--- a/README.md
+++ b/README.md
@@ -329,6 +329,9 @@ Many of the sketches in other directories in this tree are for engineering use a
 
 ### Release History
 
+- v0.4.1 minor bug fixes for V2 changes
+- v0.4.0 added V2 boards support
+- v0.3.0 added firmware update via serial feature
 - v0.2.0 adopts the common build system.
 - v0.1.3 is the first official release
 
diff --git a/catena4618m201_simple.ino b/catena4618m201_simple.ino
index 03a301a..3dd70df 100644
--- a/catena4618m201_simple.ino
+++ b/catena4618m201_simple.ino
@@ -6,7 +6,7 @@ Function:
         Sensor program for Catena 4618m201.
 
 Copyright notice:
-        This file copyright (C) 2019, 2022 by
+        This file copyright (C) 2019 - 2024 by
 
                 MCCI Corporation
                 3520 Krums Corners Road
@@ -184,7 +184,7 @@ static constexpr const char *filebasename(const char *s)
 |
 \****************************************************************************/
 
-static const char sVersion[] = "0.4.0";
+static const char sVersion[] = "0.4.1";
 
 /****************************************************************************\
 |