diff --git a/build-constraints.yaml b/build-constraints.yaml
index 3c2063e6..4be259e7 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -663,6 +663,7 @@ packages:
         # https://github.com/fpco/stackage/issues/370
         - monad-control < 1
         - lifted-async < 0.3
+        - scotty < 0.9.1
 
         # https://github.com/fpco/stackage/issues/389
         - lens < 4.7