diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..005d3d1
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "vendor/github.com/nightlyone/lockfile"]
+	path = vendor/github.com/nightlyone/lockfile
+	url = git@github.com:nightlyone/lockfile.git
diff --git a/vendor/github.com/nightlyone/lockfile b/vendor/github.com/nightlyone/lockfile
new file mode 160000
index 0000000..2275425
--- /dev/null
+++ b/vendor/github.com/nightlyone/lockfile
@@ -0,0 +1 @@
+Subproject commit 22754258d2b05a18f75f228588041de6fe9fdcc8