diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..8df2c9f
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "vendor/ruc"]
+	path = vendor/ruc
+	url = https://github.com/Riyyi/ruc
diff --git a/vendor/ruc b/vendor/ruc
new file mode 160000
index 0000000..d3de1fb
--- /dev/null
+++ b/vendor/ruc
@@ -0,0 +1 @@
+Subproject commit d3de1fb6353c81e6796515e631a73d3ec607ce3f