diff --git a/build-constraints.yaml b/build-constraints.yaml
index b9a59376..c85467c3 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2497,7 +2497,6 @@ packages:
         - every
         - extractable-singleton
         - HSet
-        - markup < 0 # 4.2.0 compile fail https://github.com/athanclark/markup/issues/7
         - monad-control-aligned
         - monadoid
         - n-tuple