diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..a853db8
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "grapevine"]
+	path = grapevine
+	url = https://github.com/scottoffen/Grapevine.git
diff --git a/grapevine b/grapevine
new file mode 160000
index 0000000..9377a90
--- /dev/null
+++ b/grapevine
@@ -0,0 +1 @@
+Subproject commit 9377a907837d8f0418687bcfc5b3adf0ba002d5e