diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..e21cc05
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "lib/brolib-sml"]
+	path = lib/brolib-sml
+	url = https://github.com/hummy123/brolib-sml
+[submodule "lib/cozette-sml"]
+	path = lib/cozette-sml
+	url = https://github.com/hummy123/cozette-sml
diff --git a/lib/brolib-sml b/lib/brolib-sml
new file mode 160000
index 0000000..014c2ef
--- /dev/null
+++ b/lib/brolib-sml
@@ -0,0 +1 @@
+Subproject commit 014c2ef7d1450d82304a8c86d33cd2673776e740
diff --git a/lib/cozette-sml b/lib/cozette-sml
new file mode 160000
index 0000000..f39f146
--- /dev/null
+++ b/lib/cozette-sml
@@ -0,0 +1 @@
+Subproject commit f39f1466a42caae953d94ac84ad9d6264c4bf85c