diff --git a/jjconfig.toml b/jjconfig.toml
index 626a5c2..f49a390 100644
--- a/jjconfig.toml
+++ b/jjconfig.toml
@@ -11,3 +11,6 @@ diff-format = "color-words"
 
 [git]
 push-new-bookmarks = true
+
+[revsets]
+immutable = "main@origin | master@origin"