diff --git a/materials/_quarto.yml b/materials/_quarto.yml
index befe7e70..842fe40e 100755
--- a/materials/_quarto.yml
+++ b/materials/_quarto.yml
@@ -23,7 +23,7 @@ book:
       - icon: twitter
         href: https://twitter.com/ucsb_nceas
       - icon: github
-        href: https://github.com/NCEAS/nceas-training/tree/2023-10-coreR
+        href: https://github.com/NCEAS/nceas-training/tree/2024-01-arctic
   
   chapters:
     - index.qmd # preface