diff --git a/.openpublishing.publish.config.json b/.openpublishing.publish.config.json
index 7cc95d61ba..08a5758d5d 100644
--- a/.openpublishing.publish.config.json
+++ b/.openpublishing.publish.config.json
@@ -29,6 +29,7 @@
   "skip_source_output_uploading": false,
   "need_preview_pull_request": true,
   "need_pr_comments": false,
+  "git_repository_branch_open_to_public_contributors": "master",
   "contribution_branch_mappings": {},
   "dependent_repositories": [
     {