diff --git a/build-constraints.yaml b/build-constraints.yaml
index 47d86b77..13924eaa 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1551,7 +1551,7 @@ packages:
         - interpolatedstring-perl6
         - iproute
         - missing-foreign
-        - MissingH < 1.5 # https://github.com/commercialhaskell/stackage/issues/6451
+        - MissingH < 1.4.3.1 # https://github.com/commercialhaskell/stackage/issues/6451
         - multimap
         - parallel-io
         - text-binary