diff --git a/setup.py b/setup.py
index ffb52a1..450c439 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@
     ],
     install_requires=[
         'pypokerengine',
-        'tornado==4.4.2',
+        'tornado==6.4.1',
         'click==6.7',
         'PyYAML==3.12',
     ],