diff --git a/.gitreview b/.gitreview
index 552e1ffc..431f74b1 100644
--- a/.gitreview
+++ b/.gitreview
@@ -1,5 +1,5 @@
 [gerrit]
 host = git.adacore.com
 project = gprbuild
-defaultbranch = master
+defaultbranch = 21.0
 defaultremote = origin