diff --git a/.gitmodules b/.gitmodules
index b57c2f5..060a64d 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "libs/pico-pio-hirsute"]
 	path = libs/pico-pio-hirsute
 	url = Gitea:liz/pico-pio-hirsute.git
+[submodule "libs/pico-sdk"]
+	path = libs/pico-sdk
+	url = Github:raspberrypi/pico-sdk.git
diff --git a/libs/pico-sdk b/libs/pico-sdk
new file mode 160000
index 0000000..9a4113f
--- /dev/null
+++ b/libs/pico-sdk
@@ -0,0 +1 @@
+Subproject commit 9a4113fbbae65ee82d8cd6537963bc3d3b14bcca