diff --git a/luigi/contrib/bigquery.py b/luigi/contrib/bigquery.py
index a1ab8486ef..4661c68245 100644
--- a/luigi/contrib/bigquery.py
+++ b/luigi/contrib/bigquery.py
@@ -52,6 +52,7 @@ class SourceFormat:
     CSV = 'CSV'
     DATASTORE_BACKUP = 'DATASTORE_BACKUP'
     NEWLINE_DELIMITED_JSON = 'NEWLINE_DELIMITED_JSON'
+    PARQUET = 'PARQUET'
 
 
 class FieldDelimiter: