diff --git a/db/migrate/20180824092855_change_domain_pending_json_to_jsonb.rb b/db/migrate/20180824092855_change_domain_pending_json_to_jsonb.rb
new file mode 100644
index 000000000..10639527a
--- /dev/null
+++ b/db/migrate/20180824092855_change_domain_pending_json_to_jsonb.rb
@@ -0,0 +1,9 @@
+class ChangeDomainPendingJsonToJsonb < ActiveRecord::Migration
+  def up
+    change_column :domains, :pending_json, 'jsonb USING CAST(pending_json AS jsonb)'
+  end
+
+  def down
+    change_column :domains, :pending_json, 'json USING CAST(pending_json AS json)'
+  end
+end
diff --git a/db/structure.sql b/db/structure.sql
index c4b0b9d7a..243a6f900 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -904,7 +904,7 @@ CREATE TABLE public.domains (
     delete_at timestamp without time zone,
     registrant_verification_asked_at timestamp without time zone,
     registrant_verification_token character varying,
-    pending_json json,
+    pending_json jsonb,
     force_delete_at timestamp without time zone,
     statuses character varying[],
     reserved boolean DEFAULT false,
@@ -4760,3 +4760,5 @@ INSERT INTO schema_migrations (version) VALUES ('20180613045614');
 
 INSERT INTO schema_migrations (version) VALUES ('20180808064402');
 
+INSERT INTO schema_migrations (version) VALUES ('20180824092855');
+