diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..55531b0
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "doc"]
+	path = doc
+	url = gitlab.com:s3lph/matemat.wiki.git
diff --git a/doc b/doc
new file mode 160000
index 0000000..8f85927
--- /dev/null
+++ b/doc
@@ -0,0 +1 @@
+Subproject commit 8f859277827574f80e392d818c25dcf24afaf5b0