diff --git a/setup.py b/setup.py
index d7e4d2c1..0df4cc01 100644
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@ if sys.argv[-1] == "publish":
     sys.exit()
 
 required = [
-    'setuptools>=36.2.1'
+    'setuptools>=36.2.1',
     'virtualenv',
     'virtualenv-clone>=0.2.5',
     'pathlib;python_version<"3.4"'