diff --git a/backend/python/qwen-tts/requirements.txt b/backend/python/qwen-tts/requirements.txt
index ef46fb5ba..35844b11d 100644
--- a/backend/python/qwen-tts/requirements.txt
+++ b/backend/python/qwen-tts/requirements.txt
@@ -3,4 +3,5 @@ protobuf
 certifi
 packaging==24.1
 soundfile
-setuptools
\ No newline at end of file
+setuptools
+six
\ No newline at end of file