diff --git a/sql/upgrades/119.sql b/sql/upgrades/119.sql
index ed53f2e..80ca642 100644
--- a/sql/upgrades/119.sql
+++ b/sql/upgrades/119.sql
@@ -1,19 +1,19 @@
 -- SWH Indexer DB schema upgrade
 -- from_version: 118
 -- to_version: 119
 -- description: metadata tables: add 'mappings' column
 
 insert into dbversion(version, release, description)
 values(119, now(), 'Work In Progress');
 
 alter table revision_metadata
-  add column mappings text array not null default {};
+  add column mappings text array not null default '{}';
 alter table revision_metadata
   alter column mappings
     drop default;
 
 alter table origin_intrinsic_metadata
-  add column mappings text array not null default {};
+  add column mappings text array not null default '{}';
 alter table origin_intrinsic_metadata
   alter column mappings
     drop default;