diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..864f74da
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "BlockusAddon"]
+    path = BlockusAddon
+    url = https://github.com/Sollace/Unicopia-Blockus-Addon