diff --git a/setup.cfg b/setup.cfg
index f8482cfc..85546df0 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -33,7 +33,7 @@ install_requires =
     psutil
     watchdog
     Pillow
-    'python-xlib @ https://github.com/selkies-project/python-xlib/archive/master.zip'
+    python-xlib @ https://github.com/selkies-project/python-xlib/archive/master.zip
 
 [options.packages.find]
 where = src