diff --git a/solr/renovate-config.js b/solr/renovate-config.js
index dd1b0e39..8defdcb4 100644
--- a/solr/renovate-config.js
+++ b/solr/renovate-config.js
@@ -7,5 +7,8 @@ module.exports = {
   repositories: [
     'apache/solr'
   ],
+  // Do independent upgrades for main and branch_9x. See renovate.json overlay file on branch_9x
+  baseBranches: ["main", "branch_9x"],
+  useBaseBranchConfig: "merge",
   allowedPostUpgradeCommands: ["./gradlew.*"]
 };