diff --git a/setup.cfg b/setup.cfg
index e46d034e..795c7c9b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -41,6 +41,11 @@ install_requires =
     rpm
     urllib3
 
+[options.extras_require]
+lint =
+    darker==1.5.1
+    mypy
+
 [options.entry_points]
 console_scripts =
     osc = osc.babysitter:main