diff --git a/litellm/proxy/batches_endpoints/litellm_executed_batches.py b/litellm/proxy/batches_endpoints/litellm_executed_batches.py
index 979e9abdba5..496d2e55a67 100644
--- a/litellm/proxy/batches_endpoints/litellm_executed_batches.py
+++ b/litellm/proxy/batches_endpoints/litellm_executed_batches.py
@@ -49,7 +49,7 @@ BatchStatus: TypeAlias = Literal[
 TERMINAL_BATCH_STATUSES: Final[frozenset[str]] = frozenset({"completed", "failed", "cancelled", "expired"})
 _STOP_STATUSES: Final[frozenset[str]] = TERMINAL_BATCH_STATUSES | frozenset({"cancelling"})
 _BATCH_ENDPOINT_ADAPTER: Final[TypeAdapter[BatchEndpoint]] = TypeAdapter(BatchEndpoint)
-_CLIENT_METADATA_ADAPTER: Final[TypeAdapter[dict[str, object]]] = TypeAdapter(dict[str, object])
+_CLIENT_METADATA_ADAPTER: Final[TypeAdapter[Mapping[str, object]]] = TypeAdapter(Mapping[str, object])
 _CANCEL_POLL_SECONDS: Final = 1.0
 _HEARTBEAT_SECONDS: Final = 30.0
 _STALE_AFTER_SECONDS: Final = 180.0