diff --git a/README.md b/README.md
index ca59c09..49f2b31 100644
--- a/README.md
+++ b/README.md
@@ -50,7 +50,9 @@ Full list of options in `config.json`:
 
 | Property                                | Type      | Required?    | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
 | -------------------------------------   | --------- | ------------ | ---------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
-| project_id                              | String    | Yes          | BigQuery project                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
+| project_id                              | String    | Yes          | BigQuery project
+| gcs_bucket                              | String    | Yes          | Google Cloud Storage Bucket to use to stage files                                                             |
+| gcs_key_prefix                          | String    |              | Prefix to use for staged files in Google Cloud Storage                                                        |
 | location                                | String    |              | Region where BigQuery stores your dataset                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
 | default_target_schema                   | String    |              | Name of the schema where the tables will be created. If `schema_mapping` is not defined then every stream sent by the tap is loaded into this schema.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
 | default_target_schema_select_permission | String    |              | Grant USAGE privilege on newly created schemas and grant SELECT privilege on newly created                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |