diff --git a/litellm/proxy/ui_crud_endpoints/proxy_setting_endpoints.py b/litellm/proxy/ui_crud_endpoints/proxy_setting_endpoints.py
index 6b56c513c5f..cea6bdfa161 100644
--- a/litellm/proxy/ui_crud_endpoints/proxy_setting_endpoints.py
+++ b/litellm/proxy/ui_crud_endpoints/proxy_setting_endpoints.py
@@ -1170,7 +1170,7 @@ async def update_internal_user_settings(
     )
 
 
-async def _validate_default_access_groups_exist(access_group_ids: list[str]) -> None:
+async def _validate_default_access_groups_exist(access_group_ids: Sequence[str]) -> None:
     """Reject default access groups that cannot be attached.
 
     Teams are created from these settings long after they are saved, and /team/new does
diff --git a/litellm/types/proxy/management_endpoints/ui_sso.py b/litellm/types/proxy/management_endpoints/ui_sso.py
index e7ccb2d4aad..4d94474e2bd 100644
--- a/litellm/types/proxy/management_endpoints/ui_sso.py
+++ b/litellm/types/proxy/management_endpoints/ui_sso.py
@@ -1,3 +1,4 @@
+from collections.abc import Sequence
 from typing import Literal
 
 from pydantic import Field
@@ -234,7 +235,7 @@ class DefaultTeamSSOParams(LiteLLMPydanticObjectBase):
         default=None,
         description="Default organization for new teams created without an explicit organization",
     )
-    access_group_ids: list[str] | None = Field(
+    access_group_ids: Sequence[str] | None = Field(
         default=None,
         description="Default access groups attached to new teams created without explicit access_group_ids",
     )