diff --git a/setup.py b/setup.py
index 1c51794d..31c67cde 100644
--- a/setup.py
+++ b/setup.py
@@ -26,7 +26,7 @@ setup(
     install_requires=[
         'setuptools',
         'Pykka >= 1.1',
-        'tornado >= 3.1.1',
+        'tornado >= 3.1',
     ],
     extras_requires={'http': []},
     test_suite='nose.collector',