diff --git a/FM.cpp b/FM.cpp
index 0cd9494..6f4c0fc 100644
--- a/FM.cpp
+++ b/FM.cpp
@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2020,2021 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2020,2021,2025 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -1205,7 +1205,7 @@ uint8_t CFM::getSpace() const
   return m_inputExtRB.getSpace() / FM_SERIAL_BLOCK_SIZE_BYTES;
 }
 
-uint8_t CFM::writeData(const uint8_t* data, uint8_t length)
+uint8_t CFM::writeData(const uint8_t* data, uint16_t length)
 {
   //todo check if length is a multiple of 3
   m_inputExtRB.addData(data, length);
diff --git a/FM.h b/FM.h
index d50b5cd..b9f7aa2 100644
--- a/FM.h
+++ b/FM.h
@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2020,2021 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2020,2021,2025 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -68,7 +68,7 @@ public:
 
   uint8_t getSpace() const;
 
-  uint8_t writeData(const uint8_t* data, uint8_t length);
+  uint8_t writeData(const uint8_t* data, uint16_t length);
 
 private:
   CFMKeyer             m_callsign;
diff --git a/M17TX.cpp b/M17TX.cpp
index eb19833..107c405 100644
--- a/M17TX.cpp
+++ b/M17TX.cpp
@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2018,2020,2021 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2018,2020,2021,2025 by Jonathan Naylor G4KLX
  *   Copyright (C) 2017 by Andy Uribe CA6JAU
  *
  *   This program is free software; you can redistribute it and/or modify
@@ -114,7 +114,7 @@ void CM17TX::process()
   }
 }
 
-uint8_t CM17TX::writeData(const uint8_t* data, uint8_t length)
+uint8_t CM17TX::writeData(const uint8_t* data, uint16_t length)
 {
   if (length != (M17_FRAME_LENGTH_BYTES + 1U))
     return 4U;
diff --git a/M17TX.h b/M17TX.h
index 850fcf1..586954d 100644
--- a/M17TX.h
+++ b/M17TX.h
@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2017,2020,2025 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -29,7 +29,7 @@ class CM17TX {
 public:
   CM17TX();
 
-  uint8_t writeData(const uint8_t* data, uint8_t length);
+  uint8_t writeData(const uint8_t* data, uint16_t length);
 
   void process();
 
diff --git a/Version.h b/Version.h
index c86e21f..53945f9 100644
--- a/Version.h
+++ b/Version.h
@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2020,2021,2022 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2020,2021,2022,2025 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -19,7 +19,7 @@
 #if !defined(VERSION_H)
 #define  VERSION_H
 
-#define VERSION "20221121"
+#define VERSION "20240113"
 
 #endif