diff --git a/freqtrade/rpc/rpc.py b/freqtrade/rpc/rpc.py
index 711170af4..680f4995f 100644
--- a/freqtrade/rpc/rpc.py
+++ b/freqtrade/rpc/rpc.py
@@ -1116,7 +1116,8 @@ class RPC:
                 "cancel_order_count": c_count,
             }
 
-    def _rpc_list_custom_data(self, trade_id: int | None = None, key: str | None = None) -> list[dict[str, Any]]:
+    def _rpc_list_custom_data(
+        self, trade_id: int | None = None, key: str | None = None) -> list[dict[str, Any]]:
         """
         Fetch custom data for a specific trade, or all open trades if `trade_id` is not provided.
         """