diff --git a/app/asr_engine.py b/app/asr_engine.py
index 3cc34cf..22fe1c1 100644
--- a/app/asr_engine.py
+++ b/app/asr_engine.py
@@ -10,7 +10,7 @@ from io import BytesIO
 import struct
 
 def audio_dic2list(audio):
-	ks = audio.keys()
+	ks = [k for i in audio.keys()]
 	ks.sort()
 	return [audio[k] for k in ks]