diff --git a/openbb_terminal/forecast/whisper_model.py b/openbb_terminal/forecast/whisper_model.py
index aa50e7b5c8a..ebec5c49d18 100644
--- a/openbb_terminal/forecast/whisper_model.py
+++ b/openbb_terminal/forecast/whisper_model.py
@@ -15,6 +15,7 @@ from transformers import BartForConditionalGeneration, BartTokenizer, pipeline
 from openbb_terminal.decorators import log_start_end
 from openbb_terminal.forecast.whisper_utils import slugify, write_srt, write_vtt
 from openbb_terminal.rich_config import console
+from typing import Optional
 
 logger = logging.getLogger(__name__)
 # pylint: disable=too-many-arguments
@@ -57,7 +58,7 @@ def transcribe_and_summarize(
     subtitles_format: str = "vtt",
     verbose: bool = False,
     task: str = "transcribe",
-    language: str = None,
+    language: Optional[str] = None,
     breaklines: int = 0,
     output_dir: str = "",
 ):