diff --git a/api/organisations/subscriptions/metadata.py b/api/organisations/subscriptions/metadata.py
index f897a3a01880..c6308892be2e 100644
--- a/api/organisations/subscriptions/metadata.py
+++ b/api/organisations/subscriptions/metadata.py
@@ -10,6 +10,7 @@ def __init__(
         api_calls: int = 0,
         projects: typing.Optional[int] = None,
         chargebee_email=None,
+        **kwargs,  # allows for extra unknown attrs from CB json metadata
     ):
         self.seats = seats
         self.api_calls = api_calls
diff --git a/api/tests/unit/organisations/chargebee/test_unit_chargebee_cache.py b/api/tests/unit/organisations/chargebee/test_unit_chargebee_cache.py
index 333a22940472..119b09b612d7 100644
--- a/api/tests/unit/organisations/chargebee/test_unit_chargebee_cache.py
+++ b/api/tests/unit/organisations/chargebee/test_unit_chargebee_cache.py
@@ -57,6 +57,7 @@ def test_chargebee_cache(mocker, db):
         "seats": 10,
         "api_calls": 100,
         "projects": 10,
+        "some_unknown_key": 1,
     }
     plan_id = "plan_id"
     plan_items = [
@@ -69,6 +70,7 @@ def test_chargebee_cache(mocker, db):
         "seats": 1,
         "api_calls": 10,
         "projects": 1,
+        "some_unknown_key": 1,
     }
     addon_id = "addon_id"
     addon_items = [