diff --git a/docs/components/arm-sip-service.rst b/docs/components/arm-sip-service.rst
index 01bc04d..b51a94d 100644
--- a/docs/components/arm-sip-service.rst
+++ b/docs/components/arm-sip-service.rst
@@ -430,6 +430,6 @@
 
 --------------
 
-*Copyright (c) 2017-2019, Arm Limited and Contributors. All rights reserved.*
+*Copyright (c) 2017-2020, Arm Limited and Contributors. All rights reserved.*
 
-.. _SMC Calling Convention: http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html
+.. _SMC Calling Convention: https://developer.arm.com/docs/den0028/latest
diff --git a/docs/components/debugfs-design.rst b/docs/components/debugfs-design.rst
index 8ce1ba6..a4f98d0 100644
--- a/docs/components/debugfs-design.rst
+++ b/docs/components/debugfs-design.rst
@@ -119,7 +119,7 @@
 
 *Copyright (c) 2019-2020, Arm Limited and Contributors. All rights reserved.*
 
-.. _SMC Calling Convention PDD: http://infocenter.arm.com/help/topic/com.arm.doc.den0028b/
+.. _SMC Calling Convention: https://developer.arm.com/docs/den0028/latest
 .. _Notes on the Plan 9 Kernel Source: http://lsub.org/who/nemo/9.pdf
 .. _Linux 9p remote filesystem protocol: https://www.kernel.org/doc/Documentation/filesystems/9p.txt
 .. _ARM SiP Services: arm-sip-service.rst
diff --git a/docs/components/exception-handling.rst b/docs/components/exception-handling.rst
index e330a62..4cca5f4 100644
--- a/docs/components/exception-handling.rst
+++ b/docs/components/exception-handling.rst
@@ -467,7 +467,7 @@
 Non-secure world to request Secure services. They're broadly classified as
 *Fast* or *Yielding* (see `SMCCC`__).
 
-.. __: http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html
+.. __: https://developer.arm.com/docs/den0028/latest
 
 -  *Fast* SMCs are atomic from the caller's point of view. I.e., they return
    to the caller only when the Secure world has finished serving the request.
diff --git a/docs/components/secure-partition-manager-design.rst b/docs/components/secure-partition-manager-design.rst
index 52b1c03..4f67185 100644
--- a/docs/components/secure-partition-manager-design.rst
+++ b/docs/components/secure-partition-manager-design.rst
@@ -807,13 +807,13 @@
 
 --------------
 
-*Copyright (c) 2017-2019, Arm Limited and Contributors. All rights reserved.*
+*Copyright (c) 2017-2020, Arm Limited and Contributors. All rights reserved.*
 
 .. _Armv8-A ARM: https://developer.arm.com/docs/ddi0487/latest/arm-architecture-reference-manual-armv8-for-armv8-a-architecture-profile
 .. _instructions in the EDK2 repository: https://github.com/tianocore/edk2-staging/blob/AArch64StandaloneMm/HowtoBuild.MD
 .. _Management Mode Interface Specification: http://infocenter.arm.com/help/topic/com.arm.doc.den0060a/DEN0060A_ARM_MM_Interface_Specification.pdf
 .. _SDEI Specification: http://infocenter.arm.com/help/topic/com.arm.doc.den0054a/ARM_DEN0054A_Software_Delegated_Exception_Interface.pdf
-.. _SMC Calling Convention: http://infocenter.arm.com/help/topic/com.arm.doc.den0028b/ARM_DEN0028B_SMC_Calling_Convention.pdf
+.. _SMC Calling Convention: https://developer.arm.com/docs/den0028/latest
 
 .. |Image 1| image:: ../resources/diagrams/secure_sw_stack_tos.png
 .. |Image 2| image:: ../resources/diagrams/secure_sw_stack_sp.png