diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..9172ae9
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "public/js/vendor/castrato"]
+	path = public/js/vendor/castrato
+	url = https://github.com/unkelpehr/castrato.git
diff --git a/public/js/vendor/castrato b/public/js/vendor/castrato
new file mode 160000
index 0000000..0824c69
--- /dev/null
+++ b/public/js/vendor/castrato
@@ -0,0 +1 @@
+Subproject commit 0824c69748bc42155ddea8683f4c4a7f382ba0f4