diff --git a/app/services/task.py b/app/services/task.py
index 27b01a9..77ca908 100644
--- a/app/services/task.py
+++ b/app/services/task.py
@@ -98,7 +98,7 @@ def generate_subtitle(task_id, params, video_script, sub_maker, audio_file):
         return ""
 
     subtitle_path = path.join(utils.task_dir(task_id), "subtitle.srt")
-    subtitle_provider = config.app.get("subtitle_provider", "").strip().lower()
+    subtitle_provider = config.app.get("subtitle_provider", "edge").strip().lower()
     logger.info(f"\n\n## generating subtitle, provider: {subtitle_provider}")
 
     subtitle_fallback = False