diff --git a/build-constraints.yaml b/build-constraints.yaml
index d0d62840..bbd1a25f 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3885,6 +3885,9 @@ packages:
         - msgpack-aeson
         - int-cast
 
+    "Akihito Kirisaki <kirisaki@klaraworks.net> @kirisaki":
+        - caster
+
     "Grandfathered dependencies":
         - Boolean
         - ChasingBottoms