diff --git a/setup.cfg b/setup.cfg
index 7a88d6f..6b9c885 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,3 +1,4 @@
 [flake8]
 max-line-length = 160
-extend-ignore = E203 # for Black
+# Black compatibility, E203 whitespace before ':':
+extend-ignore = E203
\ No newline at end of file