diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..c582725
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "bdk-ffi"]
+	path = bdk-ffi
+	url = https://github.com/bitcoindevkit/bdk-ffi.git
diff --git a/bdk-ffi b/bdk-ffi
new file mode 160000
index 0000000..e4d53b5
--- /dev/null
+++ b/bdk-ffi
@@ -0,0 +1 @@
+Subproject commit e4d53b5e4b213e484bf4b76a4bf33884dd68f086