diff --git a/ReadMe.rst b/ReadMe.rst
index 808ccd37af..cfd522fdbd 100644
--- a/ReadMe.rst
+++ b/ReadMe.rst
@@ -99,6 +99,7 @@ that are covered by additional licenses.
 -  `RedfishPkg/Library/JsonLib/jansson <https://github.com/akheron/jansson/blob/2882ead5bb90cf12a01b07b2c2361e24960fae02/LICENSE>`__
 -  `MdePkg/Library/BaseFdtLib/libfdt <https://github.com/devicetree-org/pylibfdt/blob/f39368a217496d32c4091a2dba4045b60649e3a5/BSD-2-Clause>`__
 -  `MdePkg/Library/MipiSysTLib/mipisyst <https://github.com/MIPI-Alliance/public-mipi-sys-t/blob/aae857d0d05ac65152ed24992a4acd834a0a107c/LICENSE>`__
+-  `SecurityPkg/DeviceSecurity/SpdmLib/libspdm <https://github.com/DMTF/libspdm/blob/main/LICENSE.md>`__
 
 The EDK II Project is composed of packages. The maintainers for each package
 are listed in `Maintainers.txt <Maintainers.txt>`__.