diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..a9b51a0
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "rts"]
+	path = rts
+	url = https://github.com/dmayerich/rts.git
diff --git a/rts b/rts
new file mode 160000
index 0000000..0174d82
--- /dev/null
+++ b/rts
@@ -0,0 +1 @@
+Subproject commit 0174d8239377c3eada0bf7a09d5182112e7e8db3
--
libgit2 0.21.4