diff --git a/teach_online/_config.yml b/teach_online/_config.yml
index 5b386a4..34c981e 100644
--- a/teach_online/_config.yml
+++ b/teach_online/_config.yml
@@ -25,7 +25,7 @@ bibtex_bibfiles:
 repository:
   url: https://github.com/niemasd/How-to-Teach-Online  # Online location of your book
   path_to_book: docs  # Optional path to your book, relative to the repository root
-  branch: master  # Which branch of the repository should be used when creating links (optional)
+  branch: main  # Which branch of the repository should be used when creating links (optional)
 
 # Add GitHub buttons to your book
 # See https://jupyterbook.org/customize/config.html#add-a-link-to-your-repository