diff --git a/whisper_live/vad.py b/whisper_live/vad.py
index e3a6c88..c84e5dc 100644
--- a/whisper_live/vad.py
+++ b/whisper_live/vad.py
@@ -1,3 +1,5 @@
+# original: https://github.com/snakers4/silero-vad/blob/master/utils_vad.py
+
 import os
 import subprocess
 import torch