diff --git a/pipeline/transform/models/staging/stg_gias_ukprn.sql b/pipeline/transform/models/staging/stg_gias_ukprn.sql
index 640aeb8..ed351e3 100644
--- a/pipeline/transform/models/staging/stg_gias_ukprn.sql
+++ b/pipeline/transform/models/staging/stg_gias_ukprn.sql
@@ -8,4 +8,5 @@ select
     cast("URN" as integer)          as urn,
     nullif(trim("UKPRN"), '')       as ukprn
 from {{ source('raw', 'gias_establishments') }}
-where "URN" ~ '^[0-9]+$'
+-- target-postgres types URN as bigint (the tap declares an integer).
+where "URN" is not null