diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..cee176f
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "rarop"]
+	path = rarop
+	url = https://github.com/jpenalbae/rarop.git
diff --git a/rarop b/rarop
new file mode 160000
index 0000000..a82220e
--- /dev/null
+++ b/rarop
@@ -0,0 +1 @@
+Subproject commit a82220e148154fa11b13683f00580814b758ca52