diff --git a/pyproject.toml b/pyproject.toml
index bb090d0..1c46aca 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -145,7 +145,7 @@ select = [
     "TRY",  # tryceratops
     "UP",  # python upgrade
     "W",  # pycodestyle warning
-#    "YTT",  # flake8-2020
+    "YTT",  # flake8-2020
 
     # we would like these someday, but not yet
     # "FURB",  # refurb