diff --git a/portable/GCC/ARM_CRx_MPU/mpu_wrappers_v2_asm.S b/portable/GCC/ARM_CRx_MPU/mpu_wrappers_v2_asm.S
index cbbeda00a..b2005122a 100644
--- a/portable/GCC/ARM_CRx_MPU/mpu_wrappers_v2_asm.S
+++ b/portable/GCC/ARM_CRx_MPU/mpu_wrappers_v2_asm.S
@@ -1,6 +1,8 @@
 /*
- * FreeRTOS V202112.00
- * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * FreeRTOS Kernel <DEVELOPMENT BRANCH>
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
diff --git a/portable/GCC/ARM_CRx_MPU/mpu_wrappers_v2_asm.h b/portable/GCC/ARM_CRx_MPU/mpu_wrappers_v2_asm.h
index faf6c9b86..f5ea990d7 100644
--- a/portable/GCC/ARM_CRx_MPU/mpu_wrappers_v2_asm.h
+++ b/portable/GCC/ARM_CRx_MPU/mpu_wrappers_v2_asm.h
@@ -1,5 +1,5 @@
 /*
- * FreeRTOS Kernel V10.6.0
+ * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
  * SPDX-License-Identifier: MIT
diff --git a/portable/GCC/ARM_CRx_MPU/port.c b/portable/GCC/ARM_CRx_MPU/port.c
index 7427aa7c5..abee64c33 100644
--- a/portable/GCC/ARM_CRx_MPU/port.c
+++ b/portable/GCC/ARM_CRx_MPU/port.c
@@ -1,6 +1,6 @@
 /*
- * FreeRTOS Kernel V10.6.1
- * Copyright (C) 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * FreeRTOS Kernel <DEVELOPMENT BRANCH>
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
  * SPDX-License-Identifier: MIT
  *
diff --git a/portable/GCC/ARM_CRx_MPU/portASM.S b/portable/GCC/ARM_CRx_MPU/portASM.S
index 7ea5ad42c..7ae518d5a 100644
--- a/portable/GCC/ARM_CRx_MPU/portASM.S
+++ b/portable/GCC/ARM_CRx_MPU/portASM.S
@@ -1,6 +1,6 @@
 /*
- * FreeRTOS Kernel V10.6.0
- * Copyright (C) 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * FreeRTOS Kernel <DEVELOPMENT BRANCH>
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
  * SPDX-License-Identifier: MIT
  *
diff --git a/portable/GCC/ARM_CRx_MPU/portmacro.h b/portable/GCC/ARM_CRx_MPU/portmacro.h
index cf46ac0c6..b091860f5 100644
--- a/portable/GCC/ARM_CRx_MPU/portmacro.h
+++ b/portable/GCC/ARM_CRx_MPU/portmacro.h
@@ -1,6 +1,6 @@
 /*
- * FreeRTOS Kernel V11.0.1
- * Copyright (C) 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * FreeRTOS Kernel <DEVELOPMENT BRANCH>
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
  * SPDX-License-Identifier: MIT
  *
diff --git a/portable/GCC/ARM_CRx_MPU/portmacro_asm.h b/portable/GCC/ARM_CRx_MPU/portmacro_asm.h
index c2d0c02ef..d8c5423cc 100644
--- a/portable/GCC/ARM_CRx_MPU/portmacro_asm.h
+++ b/portable/GCC/ARM_CRx_MPU/portmacro_asm.h
@@ -1,6 +1,6 @@
 /*
- * FreeRTOS Kernel V10.6.0
- * Copyright (C) 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * FreeRTOS Kernel <DEVELOPMENT BRANCH>
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -25,6 +25,7 @@
  * https://github.com/FreeRTOS
  *
  */
+
 #ifndef PORTMACRO_ASM_H
 #define PORTMACRO_ASM_H