diff --git a/build-constraints.yaml b/build-constraints.yaml
index fd40fdd3..23f0790e 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -36,6 +36,7 @@ packages:
     "Jacob Stanley <jacob@stanley.io> @jystic":
         - hedgehog
         - hedgehog-quickcheck
+        - transformers-bifunctors
 
     "Walter Schulze <awalterschulze@gmail.com> @awalterschulze":
         - katydid