diff --git a/build-constraints.yaml b/build-constraints.yaml
index 6a91221d..94bdcff9 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3878,6 +3878,7 @@ packages:
         - msgpack
         - msgpack-rpc
         - msgpack-aeson
+        - int-cast
 
     "Grandfathered dependencies":
         - Boolean