diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4b6d4213..2e3756f9 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -5183,6 +5183,7 @@ packages:
         - hs-opentelemetry-propagator-w3c
         - hs-opentelemetry-vendor-honeycomb
         - http3
+        - idn
         - iri
         - jsaddle-warp
         - lifted-threads