diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..7dfda5b
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "web/vendor/vuex-router-sync"]
+	path = web/vendor/vuex-router-sync
+	url = https://github.com/vuejs/vuex-router-sync.git