diff --git a/.gitreview b/.gitreview
index 8e4c396..4a559fa 100644
--- a/.gitreview
+++ b/.gitreview
@@ -2,3 +2,4 @@
 host=review.opendev.org
 port=29418
 project=starlingx/test.git
+defaultbranch=r/stx.4.0