diff --git a/examples/server/tornado/requirements.txt b/examples/server/tornado/requirements.txt
index ac27ff4..1a7ff9d 100644
--- a/examples/server/tornado/requirements.txt
+++ b/examples/server/tornado/requirements.txt
@@ -1,4 +1,4 @@
-tornado==6.3.2
+tornado==6.3.3
 python-engineio
 python_socketio
 six==1.10.0