diff --git a/website/docs/version_2_upgrade.html.markdown b/website/docs/version_2_upgrade.html.markdown
index 67e094f6..22826f15 100644
--- a/website/docs/version_2_upgrade.html.markdown
+++ b/website/docs/version_2_upgrade.html.markdown
@@ -468,6 +468,12 @@ Autogenerated buckets are shared by all clusters in the same region, so deleting
this bucket could adversely harm other dataproc clusters. If you need a bucket
that can be deleted, please create a new one and set the `staging_bucket` field.
+### `cluster_config.0.gce_cluster_config.0.tags` is now a Set
+
+The order of entries in `tags` no longer matters. Any configurations that
+interpolate based on an item at a specific index will need to be updated, as items
+may have been reordered.
+
## Resource: `google_filestore_instance`
### filestore resources have been removed from the GA provider