diff --git a/project.config b/project.config
index 932ea81..f4713f5 100644
--- a/project.config
+++ b/project.config
@@ -4,8 +4,10 @@
 	requireContributorAgreement = false
 	requireSignedOffBy = false
 	requireChangeId = true
+	createNewChangeForAllNotInTarget = false
 [submit]
 	mergeContent = true
+	action = rebase if necessary
 [capability]
 	administrateServer = group ldap/plan9port
 [access "refs/*"]