diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..14d4e07
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "lib/smu"]
+	path = lib/smu
+	url = https://git.sr.ht/~bt/smu
diff --git a/lib/smu b/lib/smu
new file mode 160000
index 0000000..1544a33
--- /dev/null
+++ b/lib/smu
@@ -0,0 +1 @@
+Subproject commit 1544a3321b77255e193f0c044a8c32b09be99c50