diff --git a/tox.ini b/tox.ini
index ed6f0271..b80996e5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,7 +19,7 @@ deps =
 commands = nosetests -v tests/http
 deps =
     {[testenv]deps}
-    tornado==3.1
+    tornado==3.1.1
 
 [testenv:docs]
 deps = -r{toxinidir}/docs/requirements.txt