diff --git a/source/references.rst b/source/references.rst
index a4b67728da5d5205c8636beb20019fdeff1d9773..afb11b41c0c5caafcc5b12d06a6330cdc4b4e40f 100644
--- a/source/references.rst
+++ b/source/references.rst
@@ -9,8 +9,8 @@
    September 2018, `Arm Limited <http://arm.com>`_
 
 .. [FWU] `Platform Security Firmware Update for the A-profile Arm Architecture 1.0
-   <https://developer.arm.com/-/media/Files/pdf/PlatformSecurityArchitecture/Architect/FWU-PSA-A_DEN0118_1.0ALP2.pdf>`_,
-   January 2021, `Arm Limited <http://arm.com>`_
+   <https://developer.arm.com/documentation/den0118/a>`_,
+   May 2021, `Arm Limited <http://arm.com>`_
 
 .. [EBBR] `Embedded Base Boot Requirements v2.0.0-pre1
    <https://arm-software.github.io/ebbr/>`_,