diff --git a/voice.py b/voice.py
index b71c68d..451d37e 100644
--- a/voice.py
+++ b/voice.py
@@ -59,7 +59,11 @@ _vad = None
 def _get_vad():
     global _vad
     if _vad is None:
-        _vad = silero.VAD.load()
+        _vad = silero.VAD.load(
+            activation_threshold=0.75,
+            min_speech_duration=0.2,
+            min_silence_duration=0.55,
+        )
     return _vad
 
 def _make_lk_identity(user_id, device_id):