diff --git a/docs/workshop-2/module-3-cnv-calling.ipynb b/docs/workshop-2/module-3-cnv-calling.ipynb
index f9c5a28..bb8546a 100644
--- a/docs/workshop-2/module-3-cnv-calling.ipynb
+++ b/docs/workshop-2/module-3-cnv-calling.ipynb
@@ -588,7 +588,7 @@
     "id": "1fbe0ea0"
    },
    "source": [
-    "Once the packages are imported, set up data access through the `malariagen_data` package."
+    "Once the packages are imported, set up data access through the `malariagen_data` package. Note that authentication is required to access data through the package, please follow the instructions [here](https://malariagen.github.io/vector-data/vobs/vobs-data-access.html)."
    ]
   },
   {