diff --git a/setup.cfg b/setup.cfg
index 165451f..40b125a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -10,3 +10,4 @@ multi_line_output = 5
 include_trailing_comma = true
 known_first_party = jupyter_contrib_nbextensions
 default_section = THIRDPARTY
+ignore_whitespace = true