diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..70b10c5
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,12 @@
+[submodule "pico-fido"]
+	path = pico-fido
+	url = ../pico-fido.git
+	branch = main
+[submodule "pico-openpgp"]
+	path = pico-openpgp
+	url = ../pico-openpgp.git
+	branch = main
+[submodule "pico-keys-sdk"]
+	path = pico-keys-sdk
+	url = ../pico-keys-sdk.git
+	branch = main
diff --git a/pico-fido b/pico-fido
new file mode 160000
index 0000000..a61bb91
--- /dev/null
+++ b/pico-fido
@@ -0,0 +1 @@
+Subproject commit a61bb91824467543c9f40047e84df0342f015ec0
diff --git a/pico-keys-sdk b/pico-keys-sdk
new file mode 160000
index 0000000..11d8a53
--- /dev/null
+++ b/pico-keys-sdk
@@ -0,0 +1 @@
+Subproject commit 11d8a5343c7aa76b8b32d0ec1ffc3e70ecb0eb13
diff --git a/pico-openpgp b/pico-openpgp
new file mode 160000
index 0000000..fccc48d
--- /dev/null
+++ b/pico-openpgp
@@ -0,0 +1 @@
+Subproject commit fccc48de43055a09f35f7c62f62aa543fc527021