diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..18f70a7
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "common"]
+	path = common
+	url = https://git.sixteenmillimeter.com/modules/common.git
diff --git a/common b/common
new file mode 160000
index 0000000..890aa4f
--- /dev/null
+++ b/common
@@ -0,0 +1 @@
+Subproject commit 890aa4f1633ba5507bd23e37dc2333de8ce5ae45