diff --git a/svc/routes/product_images.go b/svc/routes/product_images.go
index 5a73600..f996956 100644
--- a/svc/routes/product_images.go
+++ b/svc/routes/product_images.go
@@ -113,9 +113,9 @@ SELECT
     b.file_name,
     COALESCE(b.file_size,0) AS file_size,
     COALESCE(b.storage_path,'') AS storage_path,
-    UPPER(COALESCE(b.dimval1,'')) AS dimval1,
-    UPPER(COALESCE(b.dimval2,'')) AS dimval2,
-    UPPER(COALESCE(b.dimval3,'')) AS dimval3
+    UPPER(COALESCE(b.dimval1::text,'')) AS dimval1,
+    UPPER(COALESCE(b.dimval2::text,'')) AS dimval2,
+    UPPER(COALESCE(b.dimval3::text,'')) AS dimval3
 FROM dfblob b
 JOIN mmitem i
   ON i.id = b.src_id