diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..904240b
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "mk_doc_ultra"]
+	path = mk_doc_ultra
+	url = git@github.coventry.ac.uk:csx239/mk_doc_ultra.git
diff --git a/mk_doc_ultra b/mk_doc_ultra
new file mode 160000
index 0000000..4e33b59
--- /dev/null
+++ b/mk_doc_ultra
@@ -0,0 +1 @@
+Subproject commit 4e33b59892881fb36ec8884787d73fc90fb77f39