diff --git a/.gitmodules b/.gitmodules
index fe8a43be93..6211c59724 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -26,3 +26,6 @@
 [submodule "UnitTestFrameworkPkg/Library/SubhookLib/subhook"]
 	path = UnitTestFrameworkPkg/Library/SubhookLib/subhook
 	url = https://github.com/Zeex/subhook.git
+[submodule "MdePkg/Library/BaseFdtLib/libfdt"]
+	path = MdePkg/Library/BaseFdtLib/libfdt
+	url = https://github.com/devicetree-org/pylibfdt.git
diff --git a/MdePkg/Library/BaseFdtLib/libfdt b/MdePkg/Library/BaseFdtLib/libfdt
new file mode 160000
index 0000000000..cfff805481
--- /dev/null
+++ b/MdePkg/Library/BaseFdtLib/libfdt
@@ -0,0 +1 @@
+Subproject commit cfff805481bdea27f900c32698171286542b8d3c
diff --git a/ReadMe.rst b/ReadMe.rst
index 91b9cf3c5e..d46c534229 100644
--- a/ReadMe.rst
+++ b/ReadMe.rst
@@ -96,6 +96,7 @@ that are covered by additional licenses.
 -  `UnitTestFrameworkPkg/Library/GoogleTestLib/googletest <https://github.com/google/googletest/blob/86add13493e5c881d7e4ba77fb91c1f57752b3a4/LICENSE>`__
 -  `UnitTestFrameworkPkg/Library/SubhookLib/subhook <https://github.com/Zeex/subhook/blob/83d4e1ebef3588fae48b69a7352cc21801cb70bc/LICENSE.txt>`__
 -  `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>`__
 
 The EDK II Project is composed of packages. The maintainers for each package
 are listed in `Maintainers.txt <Maintainers.txt>`__.