diff --git a/.gitmodules b/.gitmodules
index f4785955af..ceaa5342b4 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -39,3 +39,6 @@
 [submodule "lib/libhydrogen"]
 	path = lib/libhydrogen
 	url = https://github.com/jedisct1/libhydrogen.git
+[submodule "lib/pico-sdk"]
+	path = lib/pico-sdk
+	url = https://github.com/raspberrypi/pico-sdk.git
diff --git a/lib/pico-sdk b/lib/pico-sdk
new file mode 160000
index 0000000000..493ed000dd
--- /dev/null
+++ b/lib/pico-sdk
@@ -0,0 +1 @@
+Subproject commit 493ed000ddfc21aa1db933f5477dba52ac841aac