diff --git a/build-constraints.yaml b/build-constraints.yaml
index ec01cf88..84bfa629 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1707,6 +1707,9 @@ packages:
         # https://github.com/fpco/stackage/issues/960
         - HaskellNet < 0.5
 
+        # https://github.com/fpco/stackage/issues/968
+        - bifunctors < 5.1
+
 # end of packages