diff --git a/deployment/hasura/migrations/Aerie/11_external_events/up.sql b/deployment/hasura/migrations/Aerie/11_external_events/up.sql
index 6dd687b536..ebb02f88db 100644
--- a/deployment/hasura/migrations/Aerie/11_external_events/up.sql
+++ b/deployment/hasura/migrations/Aerie/11_external_events/up.sql
@@ -1,6 +1,6 @@
 create table merlin.external_source_type (
     name text not null,
-    attribute_schema jsonb,
+    attribute_schema jsonb not null,
 
     constraint external_source_type_pkey
       primary key (name)
@@ -19,7 +19,7 @@ comment on column merlin.external_source_type.attribute_schema is e''
 
 create table merlin.external_event_type (
     name text not null,
-    attribute_schema jsonb,
+    attribute_schema jsonb not null,
 
     constraint external_event_type_pkey
       primary key (name)