diff --git a/setup.py b/setup.py
index 0803627..0b1c765 100755
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@ import sprockets.logging
 
 install_requires = []
 setup_requires = []
-tests_require = ['nose>=1.3,<2', 'mock>1,<2', 'tornado>3,<5']
+tests_require = ['nose>=1.3,<2', 'tornado>3,<5']
 
 if sys.version_info < (3, 0):
     tests_require.append('mock')