diff --git a/freqtrade/freqai/data_kitchen.py b/freqtrade/freqai/data_kitchen.py
index 0dbecdc05..a10f1cb9b 100644
--- a/freqtrade/freqai/data_kitchen.py
+++ b/freqtrade/freqai/data_kitchen.py
@@ -776,7 +776,7 @@ class FreqaiDataKitchen:
         corr_dataframes: dict = {},
         base_dataframes: dict = {},
         pair: str = "",
-        prediction_dataframe: Optional[DataFrame] = None,
+        prediction_dataframe: DataFrame | None = None,
         do_corr_pairs: bool = True,
     ) -> DataFrame:
         """