diff --git a/setup.py b/setup.py
old mode 100755
new mode 100644
index f538310..089c546
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
     'docopt==0.6.2',
     'numpy==1.13.3',
     'pandas==0.20.3',
-    'tornado==5.1.1',
+    'tornado==6.3.3',
     'lz4==2.1.6'
 ]