diff --git a/setup.py b/setup.py
index b0080adb2..94594fe70 100644
--- a/setup.py
+++ b/setup.py
@@ -80,7 +80,7 @@ def run(self):
         'traitlets>=4.1.0',
         'jupyter_client',
         'tornado>=4.2',
-        'matplotlib-inline>=0.1.0,<0.2.0'
+        'matplotlib-inline>=0.1.0,<0.2.0',
         'appnope;platform_system=="Darwin"',
     ],
     extras_require={