diff --git a/build-constraints.yaml b/build-constraints.yaml
index 64119eba..a64648c6 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2448,6 +2448,7 @@ packages:
         - haskell-src-exts-simple < 1.18.0.0
         - pointful < 1.0.9
         - hindent < 5
+        - fay < 0.23.1.13
 
         # https://github.com/fpco/stackage/issues/1764
         - aeson < 1.0