diff --git a/requirements.txt b/requirements.txt
index 7add606..7897d3b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,5 +2,5 @@ python-dotenv
 nexmo
 numba==0.48
 librosa
-tornado==4.2
+tornado==6.5.6
 webrtcvad