diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..44ac4d2
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "drupal"]
+    path = repos/drupal
+    url = https://git.drupalcode.org/project/drupal.git
+    ignore = dirty