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
diff --git a/package.json b/package.json
index 450d88d..7047eaa 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "*.(sa|sc|c)ss": [
       "npm run lint:css"
     ],
-    "*.md": [
+    "*.(md|markdown|wiki)": [
       "npm run lint:md"
     ],
     "*.htm(l)?": [