diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..aa4d0ea
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "lib/astro"]
+	path = lib/astro
+	url = git@github.com:openastro/astro.git
diff --git a/lib/astro b/lib/astro
new file mode 160000
index 0000000..53c166d
--- /dev/null
+++ b/lib/astro
@@ -0,0 +1 @@
+Subproject commit 53c166d2c70f872015077f6ea6424daead6d4c0a