diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..65a6dc5
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "libs/bdfactory"]
+	path = libs/bdfactory
+	url = https://github.com/secretsquirrel/the-backdoor-factory
diff --git a/libs/bdfactory b/libs/bdfactory
new file mode 160000
index 0000000..89d87b2
--- /dev/null
+++ b/libs/bdfactory
@@ -0,0 +1 @@
+Subproject commit 89d87b2fa1a499998a2109a751d8869e52485e0c