diff --git a/setup.py b/setup.py
index af3e1e0..22f9bc2 100644
--- a/setup.py
+++ b/setup.py
@@ -7,10 +7,10 @@
 
 setup(
     name='tormysql',
-    version='0.4.1',
+    version='0.4.2',
     packages=['tormysql', 'tormysql.platform'],
     install_requires=[
-        'tornado >=5, <6',
+        'tornado>=5',
         'PyMySQL>=0.7.10',
         'greenlet>=0.4.2',
     ],
diff --git a/tormysql/__init__.py b/tormysql/__init__.py
index 43bc72c..9870fd3 100644
--- a/tormysql/__init__.py
+++ b/tormysql/__init__.py
@@ -33,8 +33,8 @@
 from . import helpers
 
 
-version = "0.4.1"
-version_info = (0, 4, 1)
+version = "0.4.2"
+version_info = (0, 4, 2)
 
 
 def connect(*args, **kwargs):