diff --git a/.gitmodules b/.gitmodules
index 18a914be3c464376e30f56cf3631725b0ab89b52..c7f7c5ecc99abb9f148d3d94910fb490a49d5fd2 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,4 @@
 [submodule "app"]
 	path = app
 	url = https://gitlab.eclipse.org/eclipse/xfsc/tsa/task.git
+	branch = main