diff --git a/deploy/check-schema.sh b/deploy/check-schema.sh
index 32756c5..69de8a7 100644
--- a/deploy/check-schema.sh
+++ b/deploy/check-schema.sh
@@ -8,7 +8,7 @@ trap cleanup EXIT
 docker run -d --name "$container" --network none \
   -e POSTGRES_HOST_AUTH_METHOD=trust postgres:17-alpine >/dev/null
 for attempt in {1..30}; do
-  if docker exec "$container" pg_isready -U postgres >/dev/null 2>&1; then break; fi
+  if docker exec "$container" pg_isready -h 127.0.0.1 -U postgres >/dev/null 2>&1; then break; fi
   sleep 1
 done
 psql() { docker exec -i "$container" psql -X -U postgres -v ON_ERROR_STOP=1; }