diff --git a/setup.py b/setup.py
index 4268f4e..79a3eb9 100644
--- a/setup.py
+++ b/setup.py
@@ -17,6 +17,7 @@ setup(
     install_requires=[
         'ox >= 2.1.541,<3',
         'requests >= 1.1.0',
+        'tornado',
     ],
     keywords=[],
     classifiers=[