diff --git a/src/codeocean/data_asset.py b/src/codeocean/data_asset.py
index 19bfbe3..d71432a 100644
--- a/src/codeocean/data_asset.py
+++ b/src/codeocean/data_asset.py
@@ -41,6 +41,7 @@ class SourceBucket:
     origin: DataAssetOrigin
     bucket: str
     prefix: str
+    external: bool
 
 
 @dataclass_json