diff --git a/build-constraints.yaml b/build-constraints.yaml
index f6b1d804..a4a91fc5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -8006,6 +8006,9 @@ packages:
 
         # https://github.com/commercialhaskell/stackage/issues/7552
         - brick < 2.5
+
+        # https://github.com/commercialhaskell/stackage/issues/7559
+        - Diff < 1.0
     # end of Stackage upper bounds
 # end of packages