diff --git a/examples/server/tornado/requirements.txt b/examples/server/tornado/requirements.txt
index 2983f00..dbc609e 100644
--- a/examples/server/tornado/requirements.txt
+++ b/examples/server/tornado/requirements.txt
@@ -1,3 +1,3 @@
-tornado==6.5.1
+tornado==6.5.5
 python-engineio
 six==1.10.0