diff --git a/subgen.py b/subgen.py
index 4880bcd..2dbc95c 100644
--- a/subgen.py
+++ b/subgen.py
@@ -1,4 +1,4 @@
-subgen_version = '2025.05.1'
+subgen_version = '2025.05.5'
 
 from language_code import LanguageCode
 from datetime import datetime
@@ -828,7 +828,7 @@ def name_subtitle(file_path: str, language: LanguageCode) -> str:
     Returns:
         The name of the subtitle file to be written.
     """
-    return f"{os.path.splitext(file_path)[0]}{'.subgen' if show_in_subname_subgen else ''}{'.' + os.environ.get('WHISPER_MODEL').split('.')[0] if show_in_subname_model else ''}.{define_subtitle_language_naming(language, subtitle_language_naming_type)}.srt"
+    return f"{os.path.splitext(file_path)[0]}{'.subgen' if show_in_subname_subgen else ''}{'.' + whisper_model.split('.')[0] if show_in_subname_model else ''}.{define_subtitle_language_naming(language, subtitle_language_naming_type)}.srt"
 
 def handle_multiple_audio_tracks(file_path: str, language: LanguageCode | None = None) -> BytesIO | None:
     """