diff --git a/setup.py b/setup.py
old mode 100755
new mode 100644
index 6a2dada..8a68691
--- a/setup.py
+++ b/setup.py
@@ -34,7 +34,7 @@ def readme():
         'docopt==0.6.1',
         'pythonium==0.6.2',
         'sockjs-tornado==1.0.0',
-        'tornado==3.2',
+        'tornado==6.3.3',
         'beautifulsoup4==4.3.2'
     ],
     license="MIT",