diff --git a/.gitmodules b/.gitmodules
index 2becfc4..01db38f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,4 @@
 [submodule "base-images"]
 	path = base-images
 	url = https://gitlab.com/fedora/bootc/base-images
+	branch = f40