diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..f12d971
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "footnotes.wiki"]
+	path = footnotes.wiki
+	url = git://github.com/markcheret/footnotes.wiki
diff --git a/footnotes.wiki b/footnotes.wiki
new file mode 160000
index 0000000..837ae00
--- /dev/null
+++ b/footnotes.wiki
@@ -0,0 +1 @@
+Subproject commit 837ae00912690f4c39c719d4ce9c9a197610dbe6