diff --git a/api/services/kb/s3.py b/api/services/kb/s3.py
index 720d363..669de09 100644
--- a/api/services/kb/s3.py
+++ b/api/services/kb/s3.py
@@ -1,4 +1,4 @@
-"""MinIO/S3 helpers for the insurance-kb bucket.
+"""MinIO/S3 helpers for the shared kb bucket (formerly `insurance-kb`).
 
 Layout in the bucket:
     inbox/{law,regulation,circular,caselaw,tool}/<file>
@@ -41,7 +41,7 @@ def _client():
 
 
 def _bucket() -> str:
-    return os.environ.get("KB_S3_BUCKET", "insurance-kb")
+    return os.environ.get("KB_S3_BUCKET", "legal-kb")
 
 
 def list_inbox() -> list[dict]: