diff --git a/scripts/news_chunk_country_backfill.py b/scripts/news_chunk_country_backfill.py
index 604a580..319d83a 100644
--- a/scripts/news_chunk_country_backfill.py
+++ b/scripts/news_chunk_country_backfill.py
@@ -48,7 +48,7 @@ FROM documents
 WHERE source_channel = 'news'
   AND deleted_at IS NULL
   AND extracted_text IS NOT NULL
-  AND created_at >= NOW() - (:days || ' days')::INTERVAL
+  AND created_at >= NOW() - make_interval(days => :days)
 """
 
 SAMPLE_SQL = """
@@ -59,7 +59,7 @@ FROM documents d
 WHERE d.source_channel = 'news'
   AND d.deleted_at IS NULL
   AND d.extracted_text IS NOT NULL
-  AND d.created_at >= NOW() - (:days || ' days')::INTERVAL
+  AND d.created_at >= NOW() - make_interval(days => :days)
 ORDER BY d.created_at ASC
 LIMIT 5
 """
@@ -70,7 +70,7 @@ FROM documents d
 WHERE d.source_channel = 'news'
   AND d.deleted_at IS NULL
   AND d.extracted_text IS NOT NULL
-  AND d.created_at >= NOW() - (:days || ' days')::INTERVAL
+  AND d.created_at >= NOW() - make_interval(days => :days)
 ORDER BY d.created_at ASC
 """