diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..dc0be9b
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "doc"]
+	path = doc
+	url = git://github.com/Yubico/yubikey-val-server-php.wiki.git
diff --git a/doc b/doc
new file mode 160000
index 0000000..77c9a10
--- /dev/null
+++ b/doc
@@ -0,0 +1 @@
+Subproject commit 77c9a10f43f7867764bce2cf4bfd429db35c375b